Aerotex
甲醛, 三嗪聚合物
🗣️ 情景例句
Everything will come out right in the end---just you wait and see.
你就等着瞧吧，一切最终都会顺利解决。
Be slow to promise and quick to perform.
不轻诺，诺必果。
I will be back by the end of next month.
我下个月底会回来。