原级：biped
1. Next, why are man and bird bipeds, but fish footless; and why do man and bird, though both bipeds, have an opposite curvature of the legs.
其次，为何人鸟两足动物，但鱼无足；，为什么人与鸟，尽管都两足动物，有一个相反的腿弯曲。
911查询·英语单词
2. The stocky bipeds hail from the frigid world of Cadomai, where they keep to their underground homes during the long winter months.
这个矮壮的两足种族来自寒冷的卡多梅星，每到漫长的冬季就待在地下的房屋里。
3. Living primates exhibit a dazzling diversity of forms? from the saucer - eyed bush babies of sub - saharan africa to borneo's proboscis monkey to humans, the cosmopolitan bipeds
现存的灵长类动物，在形体上的差异极大，从非洲次撒哈拉地区有著碟子般大眼睛的婴猴，到婆罗洲的长鼻猴，乃至人类这种遍布全球的两足动物，令人眼花撩乱。
4. The first is what are the fewest points of motion necessary to animal progression, the second why sanguineous animals have four points and not more, but bloodless animals more than four, and generally why some animals are footless, others bipeds, others quadrupeds, others polypods, and why all have an even number of feet, if they have feet at all; why in fine the points on which progression depends are even in number.
首先是运动是什么必要的动物进展最低分，第二个为什么血红的动物有四点意见，而不是多，但不流血的动物超过4，一般为什么一些动物是无足，其他两足动物，其他四足动物，其他polypods ，为什么都有一个偶数的脚，如果他们在所有的脚，为什么在精细点上的进展取决于更是增多。
5. The Inorganic bipeds seemed to be the last word in the strangely perverse Invid design preferences, misshapen and wrongly articulated to Earthly eyes.
双足无机兽们想必是因维人古怪反常设计偏好下开发的最新品种，用地球人的眼光来看，不仅奇形怪状而且关节错位。
6. Horses, lions and dogs are quadrupeds, but humans are bipeds.
马、狮子和狗是四足动物，但人是二足动物。
7. Human beings and birds are bipeds.
人类和鸟类都是两足动物。