Unicel
二亚硝基五亚甲基四胺(发泡剂)
🗣️ 情景例句
Morning, Grandpa.
早安， 爷爷。
Happiness consists in contentment.
知足常乐。
When you have finished your experiment, please tidy the lab and put everything back in the cupboards.
做完实验后，请你们把实验室整理好，并把所有的东西放回器皿柜。