Polypentamethylene formal
[化] 聚亚戊基缩甲醛; 聚戊二醇缩甲醛
🧩 词语组成解析
formal
['fɔ:məl]
adj. （学校教育或培训）正规的;方式上的;礼仪上的;
n. <美>须穿礼服的社交集会;<口>夜礼服;
🗣️ 情景例句
Yes, honey. I did.
是的， 亲爱的， 是这样。
When it started raining, I was reading books.
当开始下雨的时候，我再看书。
when she remembered that she had gone shopping after the home help had left and she knew that she had turned both keys in their locks,
但突然记起来了，帮手是在她出去买东西之前走的，她还记得曾用了两把钥匙把大门锁上了。