There are few known fossil specimens of these ancient snakes and only three in which the hind limbs are preserved and visible.(這些古老蛇類的化石標本非常稀少，僅有的三個標本的后肢保存完好并可見。)

Their streamlined bodies, the absence of hind legs, and the presence of a fluke and blowhole cannot disguise their affinities with land dwelling mammals.(它們的身體呈流線型，后肢完全消失，身體上長出了尾片和噴水孔，所有這些特征都無法掩飾它們與陸生哺乳動物之間的親緣關系。)

Moreover, walruses and seals drive themselves through the water with thrusts of their hind flippers, but sea lions use their front flippers.(此外，海象和海豹用它們的后鰭推動自己在水中運動，而海獅用它們的前鰭。)

The first wrongly assumes that the pterosaurs' hind feet resembled a bat's and could serve as hooks by which the animal could hang in preparation for flight.(第一個（假設）錯誤地認為翼龍的后腳類似于蝙蝠的后腳，可以作為鉤子，用來掛起來準備飛行。)

The large hind legs were used for propulsion in water.(巨大的后肢用于在水中驅動。)

The glands on its hind feet can secrete poisonous fluid.(它后腳上的腺體能分泌出毒液來。)

He collects cans, crisp packets, and plastic bottles from parks near his home before jumping up onto his hind legs to place them into bins.(他在家附近的公園中收集易拉罐、零食袋以及塑料瓶，然后跳起來用后腿把它們扔到垃圾桶中。)

One big mottled arm shot out and caught Toad by a fore-leg, while the other-gripped him fast by a hind-leg.(一只長斑點的大胳膊猛地伸出來，抓住托德的一條前腿，另一只手抓住他的一條后腿。)

Suddenly the cow kicked up its hind legs.(突然奶牛踢起了后腿。)

A magnificent Poodle appeared, walking on his hind legs just like a man.(一只華麗的鬈毛狗出現了，像人一樣用后腿走路。)

The hind part of the worm wriggles the most.