🧩 词语组成解析
n. 沃尔特（男子名）
piston
['pɪstən]
n. <机>活塞;
🗣️ 情景例句
It's a simple idea, and it will work.
这主意很简单， 而且一定可行。
He can't dress himself yet because he's too young.
他还不能给他自己穿衣服因为他是太年轻的。
and at the most critical juncture we took turns in watching that point.
在最紧急的时刻，我们轮流监视那段河流的险情。