Polyphenylene
聚亚苯基
🗣️ 情景例句
Well, Grandpa will be disappointed, too.
爷爷也会感到失望。
Choose an author as you choose a friend.
选书如择友。
Summer is from December to February, and winter is in June, July and August.
夏天从12月到2月，冬天是在6月、7月和8月。