白暨豚生性害羞，视力几乎为零，是世界上最古老的豚类之一。
The baiji is shy and nearly blind and is one of the world's oldest dolphin species.
保护区为许多珍稀濒危动物提供保护，例如巨骨舌鱼、亚马逊海牛、黑凯门鳄和两种淡水豚类。
The site protects key threatened species, including giant arapaima fish , the amazonian manatee, the black caiman and two species of river dolphin.
保护区为许多珍稀濒危动物提供保护，例如巨骨舌鱼、亚马逊海牛、黑凯门鳄和两种淡水豚类。
The site protects key threatened species including giant arapaima fish the amazonian manatee the black caiman and two species of river dolphin.
也许有一天这个研究能帮助研究人员发现为什么一些被救助的鲸豚类生物在被放归大海前就失聪的原因。
The findings might someday help rescuers test whether the lost cetaceans might be deaf before releasing them back into the wild.
虽然对关切白鱀豚的存亡可能是太迟了，但是人们对关心鲸类的程度却超出了其他“不是销售热点”的物种。尽管如此，这对生态系统的功能还是至关重要的。
And although it may well be too late for the Baiji, cetaceans receive more attention than less 'marketable' species, that are nonetheless, vital for a functioning ecosystem.
他们的结果证明，在现生哺乳类中，鲸豚与偶蹄类最亲近；骆驼、河马、猪及牛羊等反刍动物都属于偶蹄类。
Experts agree that hippos belong to the mammalian order artiodactyla, a group of even - toed, hoofed creatures whose extant representatives include camels, pigs and ruminants such as cows.
他们的结果证明，在现生哺乳类中，鲸豚与偶蹄类最亲近；骆驼、河马、猪及牛羊等反刍动物都属于偶蹄类。
Experts agree that hippos belong to the mammalian order artiodactyla, a group of even - toed, hoofed creatures whose extant representatives include camels, pigs and ruminants such as cows.
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