extinct的变形

　　The idea of cloning extinct life forms still belongs to science fiction.

　　克隆已经灭绝的生物的想法仍旧只限于科幻小说中。

　　Servants are now almost extinct in modern society.

　　在现代社会里奴仆已近乎不复存在。

　　Scientists are attempting to compare features of extinct animals with living analogues.

　　科学家正试图把已灭绝动物的特征与现存类似动物相比较。