Waterproofer
防水层[布, 材料]
🗣️ 情景例句
Sure.
不用谢。
My sister worked as a secretary before she got married.
在她结婚了以前，我的姐姐为一位秘书。
Foreign countries can send their programmes to the other side of the world.
外国一些国家能把它们的节目传送到中国。