Polyanhydrides
[化] 聚酐类
🗣️ 情景例句
Your dad is quite a guy.
你爸爸真不赖。
You must go easier on yourself; you look exhausted.
你不可以太勉强，你的身体似乎太疲劳了。
These days, advertisers not only offer free samples, but free cars, free houses, and free trips round the world as well.
目前，做广告的人不仅提供免费样品，而且还提供免费汽车，免费住房，免费周游世界。