This result is obtained mainly by consideration of the four - ring molecules derived from steroids.
这个结果主要是通过从甾族化合物中取得的四环分子得到的.
辞典例句
There is a four - ring Qin Qiaodong Cuanjian Ding kiosk, name Saran Pavilion, rebuilt in 1971.
响琴桥东有一座四方攒尖顶小亭, 名“洒然亭”, 1971年重修.
互联网