extinctionn.消失；消减；废止Extinction coefficients消光系数extinction of an action[法] 诉讼时效的消灭extinction of mortagage抵押权的消灭extinction and recovery灭绝和复苏extinction turbidimeter消光浊度计extinction using vapour蒸气灭火extinction cross section消光光谱extinction probabilities灭绝概率extinction of obligation[法] 债务权的消灭extinction voltage of arc消弧电压