The increasing use of dried animal waste as a substitute fuel has also hurt the soil because this valuable soil conditioner and source of plant nutrients is no longer being returned to the land.

人们开始越来越多地使用脱水后的动物粪便作为替代燃料，这同样会损害土壤，因为这些珍贵的土壤改良剂和植物养分的来源将无法再回归到土壤之中。

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If the time for heel-dragging has been shortened, the true source of the anxiety and panic remains what it has always been.

如果犹豫不决的时间被缩短了，焦虑和恐慌的真正根源就仍然是它本身。

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His case has become a source of contention between civil liberties activists and the government.

他的案子已变成了公民自由活动家们和政府之间的争论缘由。

《柯林斯英汉双解大词典》

And because this vital source of lending has frozen up, no financial recovery plan will be successful unless it helps restart securitization markets."

VOA: special.2009.02.13

It can be understood as a source of new-found authority, of the freedom of one who has been characteristically not free and can be received by a reading community in those terms.

这可以被理解为一种新建立的权威和，一个特性上不自由的人的自由的源头,同时也可以被看做在这些领域里的一个阅读区。

耶鲁公开课 - 文学理论导论课程节选

For many investors in Asia, gold's role as a source of safety and value has been reinforced over the past year of economic uncertainty.

VOA: standard.2010.07.21

Among the challenges is modifying sensors designed to detect the heat from an incoming warhead so they can spot the much-cooler satellite, which has no heat source and is warmed only by the sun's rays.

CNN: Attempt to shoot down spy satellite to cost up to $60 million

Mysterious and beautiful, the Moon has been a source of awe and inspiration to mankind for millennia.

BBC: What if you could mine the Moon?

Apart from various ways highlighted to build capacity and tools for the same, he also stressed upon going back to our Vedas which has been source of Science and Inventions of great scientists like Einstein.

UNESCO: Science Policy and Capacity-Building