Polybutene
n. [高分子] 聚丁烯；聚异丁烯（润滑油）
🔁 扩展释义
【化】 聚丁烯
🗣️ 情景例句
You really don't look your age.
你看起来比你的年龄要年轻。
My biggest problem so far has been trying to remember everybody's name.
迄今为止我最大的问题就是尽量记住每个人的名字
the varieties are infinite; but two classes may be roughly seen.
鸟的飞行方式千差万别，但大体上可分为两类。