Polysulphide
n. [化]多硫化物
🗣️ 情景例句
Aren't you hungry, Harry?
你不饿吗， Harry？
I told him to stay till he comes back.
我告诉他留下来等他回来。
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。