Ppq
abbr. polyphenylquinoxaline 聚苯基喹喔啉
🗣️ 情景例句
autograph copies for the guests at the opening?
在展览开幕时为客人在书上亲笔签名呢
A happy heart makes a blooming visage.
心花怒放，笑逐颜开。
we are now pretty certain the Earth is the only one on which life can survive.
我们目前可以肯定的是，地球是生命能存在的唯一行星。