单词：unsaturated bond
unsaturated bond的用法和样例：
例句
- The unsaturated link occurs in a cyclic system.在环体系中存在不饱和键。
- 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。
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