An increase in the oxygen content of coal by 1% reduces that calorific value by some 1.7%. Nearly 25 neurotransmitters have been found so far.

这些材料在150摄氏度以下变得十分柔软、易于弯曲。

煤的含氧量每增加1%，其热值就下降约1.7%。

迄今为止，已经发现了大约25种神经传递素。

第1节 翻译练习3

With the result of automation, productivity has increased by 5 times in that factory.

The sales of industrial electronic products have increased to six times.

The output of the machine tools has multiplied four times.

The current has increased by a factor of three.

由于自动化的结果，那个工厂的生产率提高到5倍。

工业电子产品的销售额增加了5倍。

机床产量增加了3倍。

电流增加了2倍。

第1节 翻译练习4

This type of furnace uses 4 times more electricity than that type does.

This rod is 4 times longer than that one.

The oxygen atom is nearly 16 times as heavy as the hydrogen atom.

这种炉的耗电量是那种炉耗电量的4倍。

这根杆比那根长3倍。

氧原子的原子量几乎是氢原子量的16倍。

The atomic weight of helium is four times heavier than that of hydrogen.

In rolling bearing the starting friction is about twice the running friction.

氦原子量比氢原子量重3倍。

滚动轴承的启动摩擦大概是转动摩擦的2倍。

第1节 翻译练习5

The leads of the new condenser are shortened by six times.

The operation of cost decreased by five times.

The loss of electricity was reduced by a factor of four.

The pipe is four times lighter than that one.

新型电容器的引线缩短了5/6。

成本运行降至1/5。

这根管子重量是那根的1/4。

电损减少了3/4。

第1节 翻译练习6

Weld strength can be increased by 45 percent.

Tests have shown that the energy consuming can be reduced by 30 percent.

The loss of energy has been reduced to less than 10 percent.

焊接强度可增加45%。

试验证明，能量消耗可减低30%。

能量损耗可减至不足10%。

Its grain output was 18 percent higher than that in 1998.

The steel output is 30 percent higher than that of last year.

其粮食产量比1998年高出18%。