Opsopyrrol
[医] 3-甲[基]-4-乙[基]吡咯
🗣️ 情景例句
on the school board,
在联合校董会中
No problem.
没问题。
Once we get down to the oil, it usually flows to the surface because great pressure,
一旦到达油层，石油就会由于地下巨大的压力流到地面上来，