extinct

Dinosaurs have been extinct for millions of years..恐龙已灭绝数千万年了。

Pandas could become extinct in the wild..熊猫在野生环境中可能会绝种。

an extinct species.已灭绝的一个物种

Certain species disappeared or became ______ as new forms arose that were better adapted to the earth’s changing environment.句意： 某些物种消失了或面临灭绝， 与此同时一些更适应地球环境变化的新种类正在产生。feeble： 虚弱无力的； massive： 厚重的； 大块的； extinguish： 消灭； 熄灭。214extinguished

The panda is an endangered species, which means that it is very likely to become ______ without adequate protection. extinct： 灭绝的。句意： 熊猫是濒危物种， 这意味着如果失去充分的保护它们将会灭绝。intact： 完整无缺的； insane： 极度愚蠢的； exempt： 被免除的。314exempt

become extinct,灭绝；绝种