Polyoxybutylene
[化] 聚氧化亚丁基
🗣️ 情景例句
In less than two hours,
在不到两个小时之后，
Bottoms up!
干杯！
There were no classes this afternoon. My classmates all went to People's Park.
今天下午没有课。同学们都到人民公园去了。