Polyanhydride
[化] 聚酐
🗣️ 情景例句
It looks fine to me. But I have one suggestion.
我看写得不错，但有我个建议。
At about seven.
七点左右。
After so many years of sunshine, Harrison got a shock.
在阳光下生活了那么多年的哈里森对此感到惊奇。