Source material: Primary source for all four librettos is Schott's 1899 vocal scores (republished in the United States by Schirmer in 1904).

资料来源：四个版本都来源于1899年schott出版的歌谱(该歌谱1904年在美国由Schirmer再版)。

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The homework is a good source of study material for exams and both the homework and exams is a good source of study material for comprehensive final exams (if you've got one).

作业是帮助你考试的极好材料，而作业和考卷也是帮助你准备期末考试的好材料(如果你将会有个期末考试的话)。

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Open source hardware similarly promises that when you buy a device [the "executed" version of the design], you also receive all the source material for that device so you can modify it.

开源硬件相似地承若当你购买了一个设备(能够“执行”的设计版本)，你也得到可以用来修改它的原材料。

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They have a material that supplies electrons and a power source that lifts the energy level of those electrons.

VOA: special.2010.09.01

And source critics looking at this material discern numerous, diverse sources that are interwoven throughout.

一些材料批评学家认为这个故事，是由很多素材交织在一起的而成的。

耶鲁公开课 - 旧约导论课程节选

Okay, so when you are working with source material that looks like this, there is in fact no such thing as infinite zoom in computer science.

当我们处理,这样的原数据时，事实上计算机科学中,并不存在无限放大。

哈佛公开课 - 计算机科学课程节选

"People should understand that WikiLeaks has proven to be arguably the most trustworthy new source that exists, because we publish primary source material and analysis based on that primary source material, " Assange told CNN.

CNN: The secret life of Julian Assange

The enhanced spatial audio effect provides a new dimension of presence and depth while maintaining the integrity of the source mix and ensuring audio is always appropriate to the source material.

ENGADGET: Denon outs 2009 line of Blu-ray players, AV receivers and headphones

Assuming not, might it also help to more accurately date the composition of the source material?

FORBES: Could Computer Analysis Help Date the Gospels?