Polyacetals
聚缩醛(树脂)
🗣️ 情景例句
What's the starting salary in your company?
在你的公司底薪是多少？
Good watch prevents misfortune.
有备无患。
It is not uncommon to hear that a shipping company has made a claim for cost of salvaging a sunken ship.
航运公司为打捞沉船而提出索赔，这是常有的事，