Polyacetals
聚缩醛(树脂)
🗣️ 情景例句
We are very pleased with our presend arrangements for printing and definitely will not be considering any other services in the foreseeable future.
在今后的一段时间内我们不会考虑其他的服务提供者。
They called us just as we were having dinner.
当我们正在吃晚饭，他们就打电话给了我们。
After reading an article entitled 'Cigarette Smoking and Your Health' I lit a cigarette to calm my nerves.
读完一篇题为《吸烟与健康》的文章之后，我点上了一枝香烟，来镇定一下自己紧张的神经。