汉语知识 Learn Chinese

Units of length , 长度单位 , cháng dù dān wèi 。
mm , 毫米 , háo mǐ 。
cm , 厘米 , lí mǐ 。
dm , 分米 , fēn mǐ 。
m , 米 , mǐ 。
km , 千米 , qiān mǐ 。
km , 公里 , gōng lǐ 。
inch , 英寸 , yīng cùn 。
feet , 英尺 , yīng chǐ 。

长度单位是指丈量空间距离上的基本单元，是人类为了规范长度而制定的基本单位。其国际单位是“米”（符号“m”），常用单位有毫米（mm）、厘米（cm）、分米（dm）、千米（km）、米（m）、微米（μm）、纳米（nm）等等。长度单位在各个领域都有重要的作用。

The unit of length refers to the basic unit for measuring the spatial distance, and is the basic unit formulated by humans to regulate the length. Its international unit is “meter” (symbol “m”), common units are millimeter (mm), centimeter (cm), decimeter (dm), kilometer (km), meter (m), micrometer (μm), nanometer (Nm) Wait. The unit of length plays an important role in various fields.

sì shēng diào xué hàn yǔ, 四声调学汉语, Learn Chinese with Four Tones。
例字：
bā, 八, eight。
bá, 拔, pull。
bǎ, 把, put。
bà, 爸, dad。

声调不仅在现代汉语占有极重要的地位，就连在古音中也一样，古时汉语的声调有多少类，自来言人人殊，纷纭无定。中国传统音韵学上一向所谓的“四声”，都是声调分为把声调分为“平”、“上”、“去”、“入”四类，这情形至少在五世纪前就已经存在。

Tones play a very important role not only in modern Chinese, but also in ancient Chinese. There are many different kinds of tones in ancient Chinese. The so-called “four tones” in traditional Chinese phonology are divided into four types of tones: “ping”, “shang”, “go”, and “ent”. This situation has existed at least before the fifth century.

Math Symbols , 数学符号 , shù xué fú hào 。
Plus , 加 , jiā 。
Minus , 减 , jiǎn 。
Multiply , 乘 , chéng 。
Divide , 除 , chú 。
Equal , 等于 , děng yú 。

数学符号的发明及使用比数字要晚，但其数量却超过了数字。现代数学常用的数学符号已超过了200个，其中，每一个符号都有一段有趣的经历。

The invention and use of mathematical symbols were later than numbers, but their numbers exceeded numbers. There are more than 200 mathematical symbols commonly used in modern mathematics, and each symbol has an interesting experience.

圆形, 三角形, 正方形, 椭圆形, 长方形, 星形。

Yuán xíng, sān jiǎo xíng, zhèng fāng xíng, tuǒ yuán xíng, cháng fāng xíng, xīng xíng。

Round, triangle, square, oval, rectangle, star。

形状是一物体或其外部边界、轮廓及其表面所组成的，和物体的其他特性（如颜色、纹理、材料组成等）无关。形状也可以是由边或曲线或以上两种东西的结合来形成的封闭空间。

A shape is composed of an object or its outer boundary, contour and surface, and has nothing to do with other characteristics of the object (such as color, texture, material composition, etc.). The shape can also be a closed space formed by a side or a curve or a combination of the above two things.

例字：
live, work, 活, huó,
tongue, 舌, shé,
thousand, 千, qiān,
mouth, 口, kǒu,
ten, 十, shí,
ancient, 古, gǔ
Correction: Huó zhe 活着 means ‘alive’ in English.

Ten ways to help children remember new words quickly:

1. Painting literacy
2. Physical literacy
3. Performance literacy
4. Riddles memory method
5. Story memory method
6. Splitting memory method
7. Contrast memory method
8. Method of compiling nursery rhymes
9. Familiar characters with new characters
10. Radical classification method