Bisulfid
n. 二硫化物
🗣️ 情景例句
Where did you go to school?
你在哪儿上学？
Drop dead
晕倒
He usually takes a short walk in the evenings and is always home by seven o'clock.
傍晚常常出去溜达一会儿，并且总是在7点钟以前回来。