Lemol
聚乙烯醇
🗣️ 情景例句
You don't sound very enthusiastic.
你似乎不太热衷。
The school awarded Merry a prize for her good work).
学校因为她工作好而奖励了梅丽。
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951;
这个频率是空间氢原子释放的自然频率，是在1951年被人类发现的。