Polybutadienes
(polybutadiene 的复数) [机] 聚丁二烯
🗣️ 情景例句
How long will this letter take to get there?
这封信需要多长时间到那儿？
Jack of all trades and master of none.
什么都会，样样不精。
His engine failed and he landed on the sea for the second time.
这次他又遭厄运，因引擎故障第二次降落在海面上。