Vanillin
n. [化]香草醛,香兰素
🗣️ 情景例句
Yes, I have, Dad.
是的， 我考虑了， 爸爸。
I'm happy when I skate.
溜冰真是快乐呀。
This would solve the problem of ventilation, for if a train entered this tunnel, it would draw in fresh air behind it.
因为如果有列火车开进隧道，它就把新鲜空气随之抽进了隧道。