Bisulfid
n. 二硫化物
🗣️ 情景例句
Nowadays many TV programs need parental guidance.
现在许多电视节目需要在家长指导下观看。
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。
Where does Bill sit in the classrooom?
比尔坐在教室的那块儿？