Lever principle
[化] 杠杆原理
🧩 词语组成解析
lever
['li:və, 'levə]
n. 杠杆;操作杆;工具;
vt. 用杠杆撬动;
🗣️ 情景例句
The Post Office aims to improve its quality of service.
邮局锐意改善服务质量。
I want to make an overseas call to the United States?
我想打个电话到美国去。
They dare not tell the truth.
他们不敢说实话。