学字头主要与通过感官去学习有关。学字头常见字：学，觉。其实并没有学字头，学字头为繁体，是繁体字变成简化字以后才使用。
Learning the prefix is mainly related to learning through the senses. Common words at the beginning of learning: learn, feel. In fact, there is no learning head. The learning head is traditional, which is used only after the traditional characters have become simplified characters.
学字头容易和党字头混淆，因为学字头笔顺为点点撇，而党字头中间为竖，笔顺为竖点撇。如：党，常，尝，堂，掌，赏，棠等。
It is easy to confuse the head of the word “learning” with the head of the “party”, because the beginning of the word “study” is a little bit stroke, while the middle of the word “Dang” is vertical, and the stroke order is vertical. Such as: Dang, Chang, Taste, Tang, Palm, Reward, Tang, etc.
下面以“觉”为例介绍。
拼 音 jué jiào
部 首 见
笔 画 9
释义：
[ jué ]
1.人或动物的器官受刺激后对事物的感受辨别：感～。知～。触～。视～。～察。
2.醒悟：～悟。～醒。“～今是而昨非”。
[ jiào ]
睡眠（从睡着到睡醒）：午～。睡了一大～。
组词：
1、色觉
造句：当诱导域与试验域之间的色调差增大时，试验目标色觉位移的幅值减小，而色觉位移矢量偏离恒定色调线的偏向角却增大。
解释：各种有色光反映到视网膜上所产生的感觉。
2、发觉
造句：如果提供的工作要求雇员通勤很长的距离或者搬家到另一个州或另一个半球，那么雇主则会发觉他们应该提供更丰厚的待遇。
解释：开始知道（隐藏的或以前没注意到的事）：火扑灭了以后，他才～自己受了伤。
3、感觉器官
造句：最后，我与那个有感觉者（即那个通过感觉器官来感知某些事物的人）是同一个人，因为我确实看见了光亮，听到了噪声，感觉到了热度。
解释：感受客观事物刺激的器官，如皮肤、眼睛、耳朵等都是重要的感觉器官。简称感官。
4、觉得
造句：可是在公共场合比如在超级市场里，他还要我这样，我就觉得太冒傻气了。
解释：（1）发生某种感觉：虽然工作到深夜，但一点也不～疲倦。（2）认为（语气较不肯定）：我～应该先跟他商量一下。
5、感觉神经
造句：对于极其严重的，或时间拖得很长的神经痛发作的病例，对感觉神经、神经根及其中枢连接体施行姑息手术，可获得不同程度的疗效。
解释：见〖传入神经〗。
6、感觉
造句：这些具有扩散性的感觉并不是我们自己的，而是殖民者强加给我们的；在这个问题上我们没有选择。
解释：（1）客观事物的个别特性在人脑中引起的反应，如苹果作用于我们的感官时，通过视觉可以反映它的颜色，通过味觉可以反映它的味道。感觉是最简单的心理过程，是形成各种复杂心理过程的基础。（2）发生某种感觉：一场秋雨过后就～有点冷了。（3）觉得②：他～工作还顺利。
7、味觉
造句：这项研究的研究者亚历山大.巴奇马诺夫说：“相同的味觉细胞都拥有这些机能：将二氧化碳转化为质子，当酸感刺激的时候能感应这些质子。”
解释：舌头与液体或者溶解于液体的物质接触时所产生的感觉。甜、酸、苦、咸是最基本的四种味觉。
8、触觉
造句：结果，新生儿可能无法像他们本应可以的那样去处理触觉，这可能引发许多其他的生长发育问题，如新陈代谢问题或无规律的荷尔蒙生成问题。
解释：皮肤、毛发等与物体接触时所产生的感觉。
9、自觉
造句：正如《得到需要的爱》这本畅销书的作者哈维尔?亨德瑞克斯所言，他们发现有人会致力于自觉维护一种老套的模式，他们一起工作，互相愉悦对方。
解释：（1）自己感觉到：肺结核的初期，病症不很显著，病人每不～。（2）自己有所认识而觉悟：～自愿｜～地遵守纪律。
10、觉悟
造句：他们参与行动的动机各不相同，有的人为了”提高觉悟”，有的人为了”显示我们有能力对检察官采取行动”，并对其造成”伤害”，或引起”注意”。
解释：由迷惑而明白；由模糊而认清；醒悟：阶级～｜共产主义～｜高级领导人要提高革命～｜经过学习，大家的～都提高了。
11、痛觉
造句：随着时间的推移，它通过消耗神经细胞中一种叫做P物质（或称肽物质，一种神经传递介质）的化学物质来减轻疼痛，该物质使痛觉信号沿神经末梢传递至大脑。
解释：身体组织因受破坏或受强烈的刺激所产生的感觉。
12、听觉
造句：对于盲人来说，所有这个区域的大脑能力就浪费了，但不知何故一个盲人的大脑自我修复了，将大脑的听觉中枢与视觉中枢连接起来。
解释：声波振动鼓膜所产生的感觉。
13、睡觉
造句：我一直不理解为什么有些人晚上会工作到很晚，然后将早上的大部分时间用来睡觉，但是现在，已经凌晨1点了，我坐在这里，反反复复听着同一首歌，终于明白了。
解释：进入睡眠状态：该～了｜睡了一觉。
14、视觉
造句：所以他们一定要有一定的实用性,然而一位视觉设计师，某种程度上算是工业设计师，也将会这么说，但是使用此产品,他们应有什么样的感受？
解释：物体的影像刺激视网膜所产生的感觉。
15、嗅觉
造句：“蚊子是通过嗅觉找到我们的，但是在此之前，对于蚊子到底是如何做到这一点的，我们了解得很少，”耶鲁大学的分子生物学家约翰?卡尔森教授说。
解释：鼻腔黏膜与某些物质的气体分子相接触时所产生的感觉◇政治～。
Take “Je” as an example to introduce.
Pinyin jué jiào
radical, see you
pen drawing 9
Interpretation:
[ jué]
1. Human or animal organs’ perception of things after being stimulated: sensation~. Know ~. Touch~. Depending on ~. ~ Observation.
2. Awakening: ~ Wu. ~ Wake up. “~This is true but yesterday is not.”
[ jiào]
Sleep (from falling asleep to waking up): noon~. I slept a lot~.
Group of words:
1, color vision
In a sentence: When the hue difference between the induced domain and the test domain increases, the magnitude of the color perception displacement of the test target decreases, but the deviation angle of the color vision displacement vector from the constant hue line increases.
Explanation: The sensation produced by various colored light reflected on the retina.
2, discover
In a sentence: If the job offered requires an employee to commute a long distance or move to another state or another hemisphere, then the employer will find that they should provide more generous treatment.
Explanation: Began to know (hidden or previously unnoticed things): After the fire was put out, he~ he was injured.
3, sense organs
In a sentence: Finally, I am the same person as the sensory person (that is, the person who perceives something through the sense organs), because I do see the light, hear the noise, and feel the heat.
Explanation: Organs that feel the stimulation of objective things, such as skin, eyes, ears, etc., are all important sensory organs. Referred to as the senses.
4, feel
In a sentence: But in public places, such as in a supermarket, if he wants me like this, I feel too stupid.
Explanation: (1) A certain feeling occurs: Although I work late into the night, I am not ~ tired at all. (2) I think (with a less certain tone): I~ should discuss with him first.
5. Sensory nerves
In a sentence: For extremely severe or long-running cases of neuralgia, palliative surgery on sensory nerves, nerve roots and their central connections can achieve varying degrees of curative effect.
Explanation: See [afferent nerve].
6. Feeling
In a sentence: These diffuse feelings are not our own, but imposed on us by the colonists; we have no choice on this issue.
Explanation: (1) The reaction caused by the individual characteristics of objective things in the human brain. For example, when an apple acts on our sense organs, its color can be reflected through vision, and its taste can be reflected through taste. Feeling is the simplest psychological process, and it is the basis for the formation of various complex psychological processes. (2) A certain feeling occurred: after an autumn rain, it was ~ a bit cold. (3) Feel ②: He~ work is going well.
7, taste
In a sentence: Alexander Bachmanov, the researcher of this study, said: “The same taste cells have these functions: they convert carbon dioxide into protons, and can sense these protons when they are stimulated by acid.”
Explanation: The sensation produced when the tongue comes into contact with liquid or substances dissolved in liquid. Sweet, sour, bitter, and salty are the four basic tastes.
8, touch
In a sentence: As a result, newborns may not be able to deal with touch as they should, which may cause many other growth and development problems, such as metabolic problems or irregular hormone production.
Explanation: The sensation produced when skin, hair, etc. come into contact with objects.
9. Conscious
In a sentence: As Javier Hendricks, author of the best-selling book “Get the Love You Need”, said, they found that someone committed to consciously maintaining an old-fashioned model. They worked together to please each other.
Explanation: (1) I feel: In the early stage of tuberculosis, the symptoms are not very obvious, and the patients often do not ~. (2) I have knowledge and awareness: ~Voluntarily ~~ Obey discipline.
10. Consciousness
In a sentence: They have different motivations for participating in actions. Some people want to “raise awareness” and some people want to “show that we are capable of taking action against prosecutors” and cause “harm” to them, or attract “attention”.
Explanation: understand from confusion; recognize clearly from vagueness; wake up: class～｜Communism～｜Senior leaders want to improve revolution～｜After learning, everyone’s～has improved.
11, pain
In a sentence: Over time, it relieves pain by consuming a chemical substance called substance P (or peptide substance, a neurotransmitter) in nerve cells, which allows pain signals to be transmitted along nerve endings to the brain.
Explanation: The sensation of body tissues caused by damage or strong stimulation.
12, hearing
In a sentence: For a blind person, all the brain power in this area is wasted, but somehow a blind person’s brain repairs itself, connecting the brain’s auditory center and visual center.
Explanation: The sensation produced by sound waves vibrating the tympanic membrane.
13, sleep
In a sentence: I have never understood why some people work late at night and spend most of their time in the morning to sleep, but now, it’s 1 a.m., and I’m sitting here, listening to the same song over and over again, finally understood.
Explanation: Going to sleep: It’s time to~ Time to sleep.
14、Visual
In a sentence: So they must have a certain degree of practicality. However, a visual designer, an industrial designer to some extent, will say the same, but what should they feel when using this product?
Explanation: The image of an object stimulates the sensation of the retina.
15, smell
In a sentence: “Mosquitoes find us through smell, but before that, we know very little about how mosquitoes do this,” said Professor John Carlson, a molecular biologist at Yale University.
Explanation: The sensation produced when the nasal mucosa comes in contact with the gas molecules of certain substances ◇Politics~.