Polyphenylene
聚亚苯基
🗣️ 情景例句
You'll sleep sounder for it.
你会因此而睡得更加酣畅。
Have you had breakfast already?
你已经吃了早餐吗？
only of metal, which wears away by friction.
而是由金属组成，而金属可以随着磨擦而磨损殆尽。