Cyclononapyrrole
環(huán)壬烷吡咯
??? 情景例句
Do you have family in New York?
在紐約有親人嗎？
He sketched his own part in the affair.
他概述了自己在此事中的作用。
the young man has a glorious future before him and the old one has a splendid future behind him:
青年人有光輝燦爛的前景，而老年人的輝煌已成為過去。