您要查找的是不是：
- 共价闭(合)环(状)DNAcovalent closed circular DNA(cccDNA)
- 闭obstruct
- 共价covalence
- 共价闭合环DNAcovalently closed circular DNA(CCC DNA)
- 共价闭合环(状)DNAcovalent closed circular DNA(cccDNA)
- 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.
- 正常共价normal covalency
- 共价半径covalent radius
- 共价性covalence
- 双共价double covalence
- 共价的covalent
- 共价晶covalent crystal
- 共价式covalent formula
- 共价型intervalencetype
- 共价力covalent force
- 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.
- 共价化合covalent combination
- 共价层析covalent chromatography
- 共价成键covalent bond
- 共价偶联covalent coupling
