1. By comparison, nearly half of male high-school students express their preference for a traditional, male-headed, one provider, nuclear family, where the wife stays home as mother and housewife.
    与此相比, 几乎有一半男中学生表达了他们对传统的、以男人为家长的、只有一个人养家糊口的核心家庭的偏爱，在这种家庭里妻子作为母亲和家庭主妇呆在家里。

2. But there's a vast difference between the breeding programs as practiced by some groups (where the urge to breed certain types of people leads to efforts to destroy other types) and the much more harmless forms already practiced in democratic societi
    但是，某些团体实施的培育项目和在民主社会里已经实施的更为无害的培育方式，二者之间存在着天壤之别：前者为迫切地培育某类人而对其余的人进行毁灭，而后者，比如说律师，则是通过自由地选择与别的律师发生性关系得以实现。

3. But for over half of his screen career, Chaplin had no screen voice to confirm his British nationality.
    而在卓别林大半的银幕生涯中，银幕上的他是不出声的，也就无法证明他是英国人。

4. But a single optical fiber with a diameter of less than half a millimeter can carry more information than a large cable made of copper wires.
    但是单单一根直径小于半毫米的光纤电缆就可以比由铜丝制成的粗电缆负载更多的信息。

5. While you are on the phone, the baby pulls the table- cloth off the table, smashing half your best crockery .
    你接电话时，小孩把桌布扯下来了，把你最好的陶器打碎了一半.

6. We have been in the institute for five months and a half.
    我们在这个学院已有五个半月了。

7. Well begun is half done.
    好的开端是成功的一半。

8. When he went outside half an hour later, he was astonished to find that the little black lamb was almost white.
    半小时后，当他从屋里出来时，他惊奇地发现小黑羔羊全身几乎都变成白色。

9. We had been in the hat shop for half an hour and my wife was still in front of the mirror.
    我们在这家帽店已经呆了半个小时了，而我的妻子仍在镜子面前。

10. We got there after half an hour´s walk.
    走了半个小时便到达那里。