Difluorobromomethane
二氟一溴甲烷
??? 情景例句
Thank you. Would you like something to drink? A cup of coffee?
謝謝。你想喝點(diǎn)兒什么？來杯咖啡嗎？
They are used to seeing him every day.
他們習(xí)慣了每天見到他。
This pen doesn't write well.
這鋼筆不好寫。