每日背诵第五期50
Animals sleep in many different ways. Most prefer to sleep lying down. Some, like the giraffe, sleep standing up. A few water birds sleep standing on just one leg. Bats adopt the strangest way of all animals. They sleep upside down.
动物睡觉的方式各异，大多数是躺着睡。有些动物像长颈鹿，是站着睡觉。有些水鸟一只脚站着睡。蝙蝠采用动物中最奇异的方式睡觉，它们是倒挂着睡。
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