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1·The chief source of all this passion is that thought for what is absent and future, which, with man, exercises such a powerful influence upon all he does.

这种激情的主要来源是对所缺少的和未来的思考，这种思考和人一起，对他所做的一切产生了如此强有力的影响。

2·People regard the sun as the chief source of heat and light.

人们认为太阳是主要的热源和光源。

3·The chief source of livelihood of lesser dignitaries was petty office and graft.

较小头头的主要生活来源，是占据一个小职位，收点贿赂。

4·Personal banking is the chief source of profits for commercial banks in the West .

在西方，个人银行业务是商业银行最主要的利润来源。

5·The chief source of methane is natural gas, but it can also be produced from coal.

甲烷的主要来源是天然气，但也可以用煤来生产。

6·As the chief source of news for most Americans, it has enhanced-and exaggerated-the power of the mass of media.

作为大多数美国人的主要消息来源，电视增强和夸张了大众媒体的力量。

7·The content of radioactive radium in mineral was 19 times higer than that in rock and served as a chief source of radon.

矿石样品放射性镭含量比岩石样品高19倍，为井下氡气的主要来源；

8·The term Common Heritage of Mankind was the chief source of confusion and uncertainty in the outer space legal regime.

“人类共同继承遗产”是外层空间法律体制存在疑问和不确定性的主要原因。

9·The first shipment of this tobacco reached London in 1614. Within a decade it had become Virginia's chief source of revenue.

自从1614年第一批烟草被船运到伦敦，在十年里，它已成为弗吉尼亚的主要财源。

10·The Jordan River is the chief source of the incoming water, but since the 1960s much of its water has been diverted for irrigation.

约旦河是进水的主要来源，但自从60年代，大部分的水已被改用于灌溉。