1、
During the winter months, great flocks of gulls gather at rubbish tips and sewage outfalls.
冬季时大群大群的海鸥会聚集在垃圾场和排污口。
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2、
Outside, I could hear the shrill cries of sea gulls as they circled surf Long Island.
屋外,海鸥在波涛澎湃的长岛海域上空盘旋, 我能听见它们发出的尖叫.
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3、
4、
All of the 16 known groups originate in water birds, especially ducks and gulls.
所有这16个家族都是来源于水鸟, 尤其是鸭子和海鸥.
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