Copolyether
共聚多醚
🗣️ 情景例句
Lacks confidence and poise is nervous and ill at ease.
信心不足，不够自信，精神紧张，心神不定。
It's more valuable.
这更有价值。
Will you please try to find out for me what time the train arrives?
能不能请你帮我查查火车什么时候到？