| 释义 |
〔alkene〕Any of a series of unsaturated, open chain hydrocarbons with one or more carbon-carbon double bonds, having the general formula CnH 2n. 烯，烯烃，链烯：一系列不饱和的，有两个或两个以上碳碳双链的开链烃，其一般分子式为CnH 2n 〔olefin〕Any of a class of unsaturated open-chain hydrocarbons such as ethylene, having the general formula CnH 2 n; an alkene with only one carbon-carbon double bond. 烯烃：任何一类不饱和的开链碳氢化合物，如乙烯，总分子式为CnH 2 n；仅有一个碳—碳双链的链烯 〔plasmid〕A circular, double-stranded unit of DNA that replicates within a cell independently of the chromosomal DNA. Plasmids are most often found in bacteria and are used in recombinant DNA research to transfer genes between cells.质粒：在细胞中能独立于染色体DNA而复制的圆形的，双链的DNA单元质粒大多常发现于细菌中，在DNA重组体研究中用来在细胞间传递基因 |