10. Goodyear, an American, had been trying for years to find a way in which rubber could be made hard, non-sticky, and yet elastic.

有一个叫古德伊尔的美国人一直在努力寻找ー种方法把橡胶做得硬而不粘，但是却有弹性。

11. There are some radioactive isotopes which are produced artificially by bombardment of nuclei with neutrons.

有几种放射性同位素是通过中子轰击原子核而产生出来的。

12. The expansion of metals on heating must he taken into consideration before a long metal bridge is built.

在建造一座金属大桥前，对金属受热膨胀这ー现象必须加以考虑。

13. The engineer has a knowledge of mathematical and natural science acquired by study, experience and practice which is applied wilh judgment to develop ways to utilize, economically, the materials and forces of nature for the benefit of mankind.

工程师通过学习、经验和实践获得数学和自然科学的知识，并有鉴別地运用这些知识研究出一些途径来经济地使用自然界的材料和自然力，为人类造福。

14. Much has heen said about the complication of the nuclear power station reactor.

有关原子能电站反应堆的复杂性已经谈得很多了。

15. The time will come when homes will be heated from a small reactor in the basement.

有朝一日家庭将由安装在地下室里的小反应堆供热。

16. Other equipment has been devised which analyses noise into the various frequencies of the sounds of which it is made up and records the loudness at the different frequencies.

还设计了另外ー些设备，能将噪音分解成构成该噪音的各种不同的音响频率，并能记录不同频率的音量。

以下是英语常用被动句型的汉语习惯译法：

It is hoped that... 希望......

It is reported that... 据报道......

It is said that... 据说......

It is supposed that...据推测......

It must be admitted thal... 必须承认......

It must be pointed out that... 必须指出......

It is asserted that... 有人主张......

It is believed that... 有人相信......

It is well known that...众所周知......

It will be said that... 人们会说......

It was told that...人们曾说......

I was told that... 我听说...... 

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