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
How do you get to work everyday?
你每天怎样去上班？
He that will eat the nut must first crack the shell.
欲所得，必先劳。
But every night he heard the noise upstairs.
但每天晚上他都听到楼上的声音。