1. At present, it is believed that genes account for at least half of what researchers call "g" — the general thinking ability that IQ tests are supposed to measure — while environmental influences account for the other half.
    人们目前认为，对于研究人员称为"g"的能力 -- 即智力测验所要衡量的综合思维能力 -- 基因至少起了一半的作用，而环境影响则起到了另一半作用。

2. You must be home at half past ten.
    你必须在10点半到家。

3. Spiders are busy for at least half the year in killing insects.
    蜘蛛至少有半年在忙于吃昆虫。

4. So when the north pole tips towards the sun, the northern half of the world (or the Northern Hemisphere) is warmer and has its summer (June, July and August).
    所以，当北极斜向太阳时，地球的北半部（北半球）就比较温暖，是夏季（六、七、八月）。

5. Since then, AIDS has killed more than 204,000 Americans — half in the past few years alone.
    自那时以来，艾滋病已夺走了20.4万多美国人的生命--其中有一半是在过去几年中丧生的。

6. Sam is now a year and a half old, big enough to cross the playground's bouncy bridge himself.
    山姆现在一岁半了，有能力自己穿过操场上的蹦蹦桥。

7. People also enjoy the excitement of climbing mountains or of riding in a boat on a river that is moving very quickly or of racing in a car around a track.
    从登山中，从在湍急的河流里扬帆荡桨中以及从竞技车赛中人们获得刺激。

8. Professor Michael Barber of London University said pupils could spend half their time at school, half at home as a way to solve this problem.
    伦敦大学的迈克尔·巴伯教授说，为了解决这个问题，学生可以一半时间待在学校，一半时间待在家里。

9. Smashing half your best crockery and cutting himself in the process.
    将家中最好的陶瓷餐具半数摔碎，同时也弄伤了他自己。

10. More than half of the home computers sold in the United States in recent years will become essential to home life in the West. Future tasks computers already do at home include:
    近年来在美国售出的家庭电脑有半数以上将成为西方家庭生活的必需品。电脑已经在家庭中发挥的未来功能有：