extinct 基本解释
a. 熄灭的, 灭绝的, 耗尽的
[法] 消灭了的, 过时的, 无效的
中文词源
extinct 灭绝的，绝种的
ex-, 向外。-stinct, 刺，词源同instinct, stick. 即拔刺，拔出，比喻义连根拔起，灭绝。
词组短语
1、extinct radionuclide [化] 熄灭的放射性核素
2、extinct volcano 死火山
3、Extinct comet 已经灭绝的彗星
4、extinct language 死语，消亡语
5、extinct species 灭绝种
6、extinct nuclide 失效的核素，衰减核素
7、dodo bird extinct 渡渡鸟灭绝
8、extinct animal 灭绝动物
9、extinct volcanoes 死火山
10、become extinct 灭绝；绝种
11、sturgeon extinct 鲟鱼灭绝
12、bowhead whale extinct 弓头鲸灭绝了
13、extinct animals 灭绝动物
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