Polypentamethylene adipate
[化] 聚己二酸亚戊基酯
🧩 词语组成解析
己二酸
🗣️ 情景例句
We will also need a letter of recommendation.
我们还要求一封推荐函。
He insisted that we all be in his office at one o'clock.
他要求大家一点钟到他的办公室。[大学英语四级]
First come first served.
先到先得。