Sublabrum
内唇
🗣️ 情景例句
I wasn't good at it, and I didn't like studying it.
我不精于此道， 也不爱去学它。
There is no medicine against death.
人间哪有不死（回春）药。
The question was, which one?
问题是，哪一种气体导致火灾呢？