蹼、细长身体的水栖哺乳动物;以其皮毛而名贵。
A membrane or fold of skin connecting the toes, as of certain amphibians, birds, and mammals.
每当提起这种巨大的水栖哺乳动物,未知的总是比已知的多。
There is more unknown than known when it comes to this giant aquatic mammal.
研究者在文中指出,虽然北极熊是海洋哺乳动物,它们从海洋中获取食物(如海豹);可是它们不是水栖哺乳动物。
The researchers write that although polar bears are Marine mammals, in that they derive their nutrition from the ocean (i.e. they eat seals), they are not aquatic mammals.
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