Epm
[化] 二元乙丙橡胶; 乙丙二元橡胶
🗣️ 情景例句
OK.
好。
We invited two guests to dinner,but they didn't come.
我们邀请了2个客人去吃晚饭，但是他们没来。
Many people in industry and the Services, who have practical experience of noise,regard any investigation of this question as a waste of time;
在工业部门工作和在军队中服役的许多人对噪音有切身的体会，他们认为对这个问题进行调查是浪费时间，