1. All the systems are electric.
    整个系统都是电气化的.

2. All natural systems tend toward balance among opposing factors or forces.
    所有自然体系都趋向于在各种对立因素或力量中保持平衡。

3. Some people like to innovate the old systems and traditions; others like to preserve them.
    有些人喜欢改革旧有的制度及传统，有些人却喜欢保留它们。

4. Powerfrugal systems would keep electricity usage low so that the demand on outside sources is low.
    节能系统能使用电量降低，因此对外来电力的要求比较少。

5. Sewage disposal into the sources themselves, leakage of sewage into distribution systems or contamination with industrial or farm waste.
    污水排入水源，污水渗入给水系统或工农业污水造成污染。

6. Our country has prospered by various incentive systems.
    我们的国家困各种不同的奖励制度而繁荣起来。

7. In places where the water is not potable, they set up purifying systems.
    在水无法饮用的地方，人们设立净化系统。

8. In a way, China's backwardness is an advantage, because the expansion occurs just as new technologies are becoming cheaper than copper wire systems.
    从某种意义上说，中国的落后成了一种有利因素，因为这一发展正好发生在新技术比铜线电缆系统更便宜的时候。