每一种哺乳动物、鸟类和大多数爬行动物、两栖类动物和鱼类都需要睡眠来维持正常的生命活动。
Each kind of mammals, birds and most reptiles, amphibians animals and fish are in need of sleep to maintain normal life activities.
每一种哺乳动物、鸟类和大多数爬行动物、两栖类动物和鱼类都需要睡眠来维持正常的生命活动。
Each kind of mammals, birds and most reptiles, amphibians animals and fish are in need of sleep to maintain normal life activities.
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