Limescale
n. 水垢; 垢石
🗣️ 情景例句
Are the people friendly in China?
中国的人们友好吗？
There is nothing which has not been bitter before being ripe.
事情在成功前没有不艰苦的。
I may.I can't make up my mind.
有可能退。我还拿不定主意。