您要查找的是不是：
- 共价闭合环DNAcovalently closed circular DNA(CCC DNA)
- 共价闭合环(状)DNAcovalent closed circular DNA(cccDNA)
- 共价闭合环状DNAccc DNA; covalent closed circular DNA; covalently closed circular DNA
- 开环DNAopen-circle DNA
- 共价闭合松弛DNA covalently colsed relaxed DNA
- oc DNA 开环DNAopen circular DNA
- DNA开环脱氧核糖核酸，开环DNAocDNA; open circular
- 共价闭合松弛DNAcovalently close relaxed DNA
- 共价闭合松驰DNAcovalent closed relaxed DNA
- 开环制open system
- 共价covalence
- 四开环pendant collet
- 开环同步open loop synchronization
- 共价闭合环状DNA分子covalent colsed circular DNA molecule
- 开环固化curing reaction
- 共用电子对数，共价一个原子与其他原子共用的电子的对数The number of electron pairs an atom can share with other atoms.
- 开环特性open loop characteristic
- 正常共价normal covalency
- 开环浓导open-ring waveguide
- 共价半径covalent radius
