Polyacetal
[化] 聚缩醛
🗣️ 情景例句
Please come and see me in my office on the 20th floor.
请到二十楼我的办公室来见我。
Those that make the best use of their time have none to spare.
能充分利用时间的人不会有时间多馀。
What's your job?
你是做什么工作的？