Your brain uses over a quarter of the oxygen needed by your body. Your heart beats around 100,000 times a day. Adult lungs have a surface area of around 70 square metres ! Most adults have 32 teeth. The smallest bone found in the human body is located in the middle ear. Infants blink only once or twice a minute. And adults average around 10. The left side of your body is controlled by the right side of your brain. The right side of your body is controlled by the left side of your brain.
-brain ［breɪn ］ n. 头脑，智力；脑袋
-quarter ［'kwɔ:tə(r) ］ n. 四分之一
-oxygen ［'ɒksɪʤən ］ n. 氧气
-beat ［bi:t ］ vt. 打；拍打
-lung ［lʌŋ ］ n. 肺
-surface ［'sɜ:fɪs ］ n. 表面；表层
-infant ［'ɪnfənt ］ n. 婴儿；幼儿
-blink ［blɪŋk ］ vi. 眨眼
square metre 平方米
be controlled by 受……控制
1. Most adults have 32 teeth. 大多数成年人有32颗牙齿。
Most residents here have an adequate income. 这里大多数居民有足够的收入。
Most families here have two nice flats. 这里大多数家庭有两套舒适的房子。
2. Infants blink only once or twice a minute. 婴儿每分钟眨眼一次或两次。
She blinked her eyes nervously. 她紧张地眨了眨眼。
The girl blinked away her tears. 那个女孩眨了眨眼挤出泪水。
人体小知识
你身体所需要的氧气有四分之一被你的大脑使用了。你的心脏每天跳动大约10万次。成人的两个肺的表面积有大约70平方米！大多数成年人有32颗牙齿。人体中最小的骨头位于耳朵的鼓室（中耳）里。婴儿每分钟眨眼一次或两次，成年人平均每分钟眨眼约莫十次。你身体的左边由你大脑右侧所控制，而你身体的右边则受你大脑左侧控制。