The blue whale can produce the loudest sound in the world of animals. Horses and cows sleep while standing up. Hummingbirds are very agile . They can fly backwards . Sharks lay the biggest eggs in the world. Unlike humans, sheep have four stomachs . Each stomach helps them digest food. Mosquitoes can be annoying insects . But do you know? Only female mosquitoes actually bite humans. How interesting this world is !
-produce ［prə'dju:s ］ vt. 产生；引起
-hummingbird ［'hʌmɪŋbɜ:d ］ n. 蜂鸟
-agile ［'æʤaɪl ］ adj. 敏捷的；机敏的
-backwards ［'bækwədz ］ adv. 倒着；向后
-lay ［leɪ ］ vt. 产卵；搁放
-stomach ［'stʌmək ］ n. 胃
-digest ［daɪ'ʤest ］ vt. 消化；吸收
-annoying ［ə'nɔɪɪŋ ］ adj. 讨厌的；恼人的
annoying insects 讨厌的昆虫，令人恼火的昆虫
1. Horses and cows sleep while standing up. 马和牛都站着睡觉。
My mother is cooking, while my father is reading. 母亲在做饭，父亲在读书。
Mary is dancing, while I am singing. 玛丽在跳舞，我在唱歌。
2. How interesting this world is! 这个世界多么有趣呀！
How beautiful she is! 她真美呀！
How clever that boy is! 那个男孩真聪明！
有趣的动物知识
在动物世界中，蓝鲸能发出最响亮的声音。马和牛站着睡觉。蜂鸟非常敏捷，它们能够倒飞。鲨鱼产的卵是世上最大的。绵羊不同于人，它们有四个胃，每个胃都有助于消化食物。蚊子可能是让人恼火的昆虫——可你知道吗？实际上，只有雌蚊子才吸人血。这个世界多么有趣呀！