Polyacetals
聚缩醛(树脂)
🗣️ 情景例句
She sure does.
她的确如此。
Chuck went to a restaurant that serves very tasty salads.
贾克去一家有美味色拉的餐厅用餐。
That does not prove that it does not exist;
这并不是证实不存在噪音对健康的影响。