Vanillin
n. [化]香草醛,香兰素
🗣️ 情景例句
It's no big deal.
这没有什么。
I didn't know whether to send the letter airmail or not.
我不知道是否送航空邮件。
for the monotonous rhythm of the wheels clicking on the rails soon lulls you to sleep.
车轮与铁轨间单调的嘎喳声很快就会送你进入梦乡。