U-tube
[化] U型换热管
🧩 词语组成解析
🗣️ 情景例句
I'm totally exhausted by the time I get home.
等我回到家，已经累得精疲力竭了。
One man makes a chair and another man sits in it.
坐享其成。
He set up a fine example to all of us.
他为我们树立了一个好榜样。