"Extinct"是已灭绝的英文说法。
来源：这个词源自拉丁语"extinguere"，意思是“熄灭、消灭”。
例句：
The dodo bird is now extinct. (多多鸟现已灭绝。)
The extinction of the dinosaurs was pkely caused by a meteorite impact. (恐龙的灭绝可能是由于陨石撞击造成的。)
Many species of plants and animals are at risk of extinction due to human activity. (由于人类活动，许多种植物和动物都处于灭绝的危险之中。)