易混淆的单词： Vestigial

An ostrich has vestigial wings .

鸵鸟长有退化了的翅膀。

Its hand showed a vestigial first finger and robust second and third fingers .

它的前爪有着退化的食指，健壮的第二和第三趾。

In fact , the vestigial atmosphere is still slowly dissipating into space .

事实上，残余的大气层仍在缓慢地消散于太空中。

In their view , tyrannosaurusarms were vestigial organs , like the blind eyes of cave-dwelling fish .

在他们看来，霸王龙的前肢是退化的遗留物，就像穴居鱼类的盲眼。

Any of several chiefly tropical constrictors with vestigial hind limbs .

后肢退化的几种主要是产于热带的蟒蛇。