Amtrak
辅助 Assistantabbr. 美国铁路公司（American track）
🗣️ 情景例句
It was my please.
荣幸之至。
Look before you leap. First think, then act.
三思而后行。
I concluded that they were simply shy of strangers.
我认为这不过是他们在陌生人面前表现出的害羞。