全國公共英語PETS-2精品閱讀157

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.
    動物睡覺的方式各異，大多數(shù)是躺著睡。有些動物像長頸鹿，是站著睡覺。有些水鳥一只腳站著睡。蝙蝠采用動物中最奇異的方式睡覺，它們是倒掛著睡。