Percarbonate
过碳酸钾; 过碳酸盐
🗣️ 情景例句
Ah. She's out.
啊。她出去了。
I would like you to keep is a secret.
我要你保守秘密。
I looked at the map and then at the millimeter.
我看了看地图，又查了一下里程表。