Ocean mammals, including seals, killer whales and dolphins, are also affected."Whether
包海豹，食人鲸和海豚这些哺乳动物都将受到影响。
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.
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。
Pershing says Roman's work is bound to get scientists thinking more about the role of large marine mammals in ocean ecosystems.
珀欣说，罗曼的研究会使科学家们更关注海洋生态系统中，大型海洋生物扮演的角色。
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