Fumar
[医][=fumaroid]反式异构化合物
🗣️ 情景例句
Have you ever done supervisory work?
你担任过管理工作吗？
Take one's courage in both hands.
勇往直前，敢作敢为。
Before you leave the lab, make sure the electricity is turned off and the windows are shut.
你们离开实验室前，务必要关上电源，关好窗户。