Pbt
[化] 聚对苯二甲酸丁二酯
🗣️ 情景例句
Do what you are told.
叫你怎么做，你就怎么做。
Once an opportunity slips away, it is gone for good.
机会一旦错过，永远不会再来。
Not all sounds made by animals serve as language.
动物发出的声音不都是用作语言交际。