Limescale
n. 水垢; 垢石
🗣️ 情景例句
We used to catch crabs.
我们以前常捉螃蟹。
He did it in no time.
他马上把那事给做了。
from which can be seen the strata the drill has been cutting through.
从中能看出钻头所钻透的地层。