Velocity variation
[电] 变速
🧩 词语组成解析
🗣️ 情景例句
when Molly gave him the injection.
Molly给他打针时。
Poverty on an old man's back is a heavy burden.
老而贫穷，负担沈重。
Good morning, Mr. WU:?Here's my homework. I was ill on Monday, so it's late.
吴先生，早上好！这是我的英语家庭作业。我星期一病了，所以迟交。