Polyanhydrides
[化] 聚酐类
🗣️ 情景例句
I knew it.
我也知道了 。
My sister graduated from high school.Graduation was last night.
我的姐姐从高中毕业了.毕业典礼是昨天晚上。
We have all experienced days when everything goes wrong.
我们大家都有过事事不顺心的日子。