Using non-performing rubber trees as a source of power also helps rejuvenate rubber production by making room for new planting.

VOA: standard.2009.09.13

Revisions implying that you've got something and then it's worked over again, additions might be made so now that's a new source.

修订意味着，你已经有素材,重新研究，这时候所增加的，变成了新的素材。

耶鲁公开课 - 旧约导论课程节选

That has been a frequent source of the criticism of the New Criticism in its afterlife over the last forty or fifty years.

这也是新批评派,在过去四五十年的,理论根据之一。

耶鲁公开课 - 文学理论导论课程节选

It seems Pandora is the only place in the galaxy with deposits of a valuable new energy source worth untold millions back on Earth.

VOA: standard.2009.12.19

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

Cigarette taxes are a vital revenue source for New York State, which has the highest-priced cigarettes in the nation - almost $15 a pack.

VOA: standard.2010.08.11