您要查找的是不是：
- 环DNAcircular DNA; cyclic DNA
- 开环DNAopen-circle DNA
- 松环DNAopen-circle DNA; relaxed circular DNA
- 环loop
- 滚环DNA扩增rolling circle DNA amplification
- 共价闭合环DNAcovalently closed circular DNA(CCC DNA)
- oc DNA 开环DNAopen circular DNA
- 环比link relative ratio
- 圆环traffic circle
- 环的annular
- 环氧epoxy
- 环氧乙烷epoxy ethane
- 环己hexanaphthene
- DNA开环脱氧核糖核酸，开环DNAocDNA; open circular
- 外环outer ring
- 环保护ring protection
- 手环wrist strap
- 环岛rotary island; roundabout
- 卡环snap ring
- 内环inner belt
