Collections
n. 集合物件；收集（collection的复数）
🗣️ 情景例句
I've never seen you so wound up.
我从来没有看过你这么紧张。
Tom reads newspapers in the afternoon.
汤姆下午读报。
So was born the echo-sounding apparatus, now in general use in ships.
这样就产生了目前各种船舶上普遍应用的回声探测仪。