At most, their forelegs grow vestigial spurs where wing membrane might have been. 最終，它們本應長為翅膀的前肢會退化為薄膜。
Immediately behind the shoulders ribs are flattened enough to allow free movement of the forelegs, becoming rounder behind. 肩胛后面的肋骨立即變平，允許前肢能自由運動，隨后逐漸變圓。
近義反義詞
Fores
fore
forepart danger
forelocked bolt
fore runner tip
foreshore beach
fore out rocker
forehand service
forecourt player
fore vacuum pump
fore out bracket
fore stand plate