1·Moreover, walruses and seals drive themselves through the water with thrusts of their hind flippers, but sea lions use their front flippers.
此外，海象和海豹用它们的后鳍推动自己在水中运动，而海狮用它们的前鳍。
2·Some species simply live in the dung, while others form perfectly spherical dung balls, which they roll with their hind legs, often over large distances, to a place where they can bury it.
部分蜣螂干脆居住在粪便当中，其他蜣螂用自己的后足将粪便滚成完美的球形，进行距离的运输，直到到达它们埋藏粪球的地方。
3·However when they injected the hind leg of mice with the CD47 suppressor, it showed much less hair loss, ulceration and peeling when targeted by radiation than an untreated leg.
但是他们发现，在给小鼠的后腿注射了CD47抑制剂后，脱发，溃疡和脱皮这些暴露在放射线下的副作用相比于没有注射CD47抑制剂的小鼠后腿减轻了很多。
4·Swift and agile, Antarctic fur seals rely on their powerful front flippers to propel them through the water; smaller hind flippers help with steering.
动作灵活而快捷的南极海豹依靠其强大的鳍状前肢，让它们在水中顺利前行；小一些的后鳍帮助控制方向。
5·Cold hind coughs for long think quite quite went without seasonable cure.
一次感冒后长时间咳嗽，以为挺挺就过去了，没有及时医治。