tetrapod

基本解释

There was, however, one characteristic of Acanthostega that called to mind neither tetrapod nor fish.
然而牠有一个特徵却不属于四足动物也不属于鱼类。
Although biologists can easily induce extra limbs to grow on the flank of a tetrapod, this cannot be done in the neck.
虽然生物学家能轻易让四足动物在侧腹长出额外的肢，在颈部却做不到。
And the fusing of bones making up the lower jaw fortified this region, facilitating the presumed“ buccal pump” mode of tetrapod ventilation.
下颔部位骨头的愈合也加强支撑力，帮助可能以口部当做帮浦的形式换气。
Tetrapod For example, fingers or toes is not new to us by our ancient ancestors of fish they are the distal radial evolved.
对于四足动物来说，手指或脚趾绝对不是新鲜的事物，它们是由远祖鱼类的桡骨远端进化而来。
For one thing, its ribcage would have restricted the lateral undulation of the trunk that typically occurs in tetrapod movement.
典型四足动物的运动方式是躯干左右摇摆，而牠的胸廓会妨碍做这种运动。