一头憨态可掬的幼狮正在国家动物园狮子栖息地的护城河里学习游泳。
A young lion cub tries to swim in the moat surrounding the lion habitat at the National Zoo.
它们的午睡时间有19 - 20个小时。狮子的栖息地已经变小，而且很有可能更小。
With 19-20 hours of nap time. The habitat of lions has shriveled, and threatens to shrivel more.
狮子的栖息地变小了。
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