Thpc
[建] 氯化四(羟甲基)磷
🗣️ 情景例句
To help scrub the building interior clean.
帮忙把建筑的内部擦洗干 。
If you're not sure how to do is, ask me.
假如你拿不准怎样做，就来问我好了。
She entered the station twenty minutes before the train was due,
在火车进站20分钟前她就进了车站。