The ivory gull often follows polar bears to feed on the remains of seal kills.
象牙海鸥经常跟在北极熊的后面吃剩下的海豹尸体。
The history of America at sea is presented through the travels of Seabird, a carved ivory gull.
主要通过海鸟：一个雕刻的乳白色的海鸥的海上游记来描述美国海上历史。
The report names three seabirds in jeopardy - the Kittlitz's murrelet, spectacled eider and ivory gull;
报告中也将三种海鸟列入危险名单，他们是小嘴斑海雀、白眶绒鸭以及象牙海鸥。
The report names three seabirds in jeopardy - the Kittlitz's murrelet, spectacled eider and ivory gull;
报告中也将三种海鸟列入危险名单，他们是小嘴斑海雀、白眶绒鸭以及象牙海鸥。
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