unsaturated linkage

• 不饱和键

unsaturated linkage的用法和样例：

例句

1. The unsaturated link occurs in a cyclic system.
   在环体系中存在不饱和键。
2. Dialkyl quaternary ammonium salts can be used as fabric softeners with high performance, their biodegradation can be improved by inducing unsaturated bond into their alkyl chain.
   摘要双烷基季铵盐类产品是一种性能优良的织物柔软剂，如果在烷基链中引入不饱和键，就会提高其生物降解性。