Polyacetal
[化] 聚缩醛
🗣️ 情景例句
I've got to call a caterer.
我应该给宴会承办者打一个电话。
I am Jason Liu and I'm working for an insurance company in Shenzhen.
我叫杰森.刘，在深圳一家保险公司工作。
its action depends on the surface, water or ground, over which it rides.
它的飞行取决于它所悬浮的水面或地面。