Polybutadienes
(polybutadiene 的复数) [机] 聚丁二烯
🗣️ 情景例句
I'm glad you came by, Alexandra.
我很高兴你能来 Alexandra。
Nothing is difficult to a man who wills.
世上无难事，只怕有心人。
Hello. You look tired today.
你好。你今天显得有点儿累。