extinction

灭绝；消失；消灭；废止英释中释nwhen a particular type of animal or plant stops existing

1 extinction ratio,消光比；消减比率

2 extinction coefficient,消光系数

3 mass extinction,大量消亡

4 fire extinction,灭火

5 arc extinction,消弧，灭弧

6 light extinction,消光；消光法

7 extinction angle,消光角

1 species in danger of extinction.有灭绝危险的物种

2 They were hunted almost to extinction..它们遭受猎杀，几近灭绝。

3 Conservationists are trying to save the whale from extinction..生态环境保护工作者正努力挽救鲸类以防止其灭绝。