失业率, 是指没有工作且在积极找工作的人（除了小孩，老人，不能工作者）占劳动人口总数的百分比。公式：失业率% = 失业人数 /（在业人数+失业人数）%。
Unemployment rate refers to the percentage of people who are unemployed and actively looking for work (except children, the elderly, and those who cannot work) in the total labor force. Formula: Unemployment rate% = Number of unemployed people / (number of employed people + number of unemployed people)%.
利息是货币在一定时期内的使用费，指货币持有者（债权人）因贷出货币或货币资本而从借款人（债务人）手中获得的报酬。包括存款利息、贷款利息和各种债券发生的利息。
Interest is the fee for using money in a certain period of time, which refers to the remuneration that the holder of money (creditor) receives from the borrower (debtor) for lending money or monetary capital. It includes deposit interest, loan interest and interest on various bonds.
美国总统选举（US presidential election），简称美国大选，是美国每四年举行一次的选举，以产生总统及副总统。赢得270张或以上选举人票的总统候选人即获得选举胜利。50个州按人口比例分配选举人票。
The US presidential election, also known as the US general election, is an election held every four years in the United States to elect the president and vice president. The presidential candidate who wins 270 or more electoral votes wins the election. The 50 states allocate electoral votes according to population proportion.