It is the female lion who does more than 90 percent of the hunting while the male is afraid to risk his life, or simply prefers to rest。

　　90%的食物由母狮猎取，雄狮则害怕用生命冒险或者只是喜欢休息。


　　There are no penguins at the North Pole. In fact, there are no penguins anywhere in the Northern Hemisphere except in zoos. All seventeen varieties of the bird are found below the equator, primarily in Antarctica。

　　北极没有企鹅。事实上，北半球除了动物园里，任何地方都没有企鹅。所有17种企鹅都在赤道以南，主要在南极洲。


　　Arctic terns found in North America and the Arctic migrate each year as far south as Antarctica and back, a round trip of over 18,000 miles. Theirs is probably the longest migration flight.

　　人们发现北美洲和北极地区的北极燕鸥每年一直要迁移到南极洲再飞回来，往返形成超过18,000英里。这也许是最远的迁移飞行。

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