您要查找的是不是：
- 甾擇環(huán)Astereoselective ring A
- 苯并卟啉衍生物單酸環(huán)Aphotosensitizer
- 環(huán)A的子集S叫作A的子環(huán)。A subset S of a ring A is a subring of A.
- 環(huán)loop
- 本組化合物的HOMO、LUMO主要分布在母環(huán)A環(huán)和B環(huán)的C 3位到N 6位這一區域以及O 2 1位上 ;The component of HOMO and LUMO mainly distributed from C-3 to N-6 and O-21 on the ring A,B;
- 甾steroid nucleus
- 擇日choose an auspicious day
- 環(huán)比link relative ratio
- 不僅A而且not merely A but also B
- 圓環(huán)traffic circle
- 與其說(shuō)A不如說(shuō)not so much A as B
- 環(huán)的annular
- A股A-share
- 環(huán)氧epoxy
- 把A誤以為take A for B
- 環(huán)氧乙烷epoxy ethane
- 環(huán)己hexanaphthene
- 莧甾酮Aamarasterone A
- 外環(huán)outer ring
- 環(huán)保護ring protection
