Low levels of straying are crucial, since the process provides a source of novel genes and a mechanism by which a location can be repopulated should the fish there disappear.

低水平的游离是至关重要的，因为这个过程提供了一种新基因的来源和一种机制，通过这种机制，如果该地鱼群消失，可以重新繁殖该种群。

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While there are things that you shouldn't see, there are some things that can be lawfully considered—making it a valuable source of relevant information too.

虽然有些内容你不应该去看，但也有一些内容可以在合法情况下去考量，使其也能成为相关信息的宝贵来源。

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Now, in addition to preparation of the reporter and competence of the news source, there is one more important ingredient in successful news coverage, that is the nature of the questions asked.

现在，除了记者的准备工作和新闻来源的竞争力，成功的新闻报道还有一个重要的因素，那就是所提问题的性质。

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"They are worried about the possible side effects, about what they listen to from friends and the Internet because there is no official source.

VOA: standard.2009.11.25

But thankfully now in 2010, we're at the point where there's a whole lot of free and open source software that you can integrate into your projects that other nice people have made available.

不过幸好在2010年,现在有很多可用的开源,代码软件，你可以将其融合,到你的工程中。

哈佛公开课 - 计算机科学课程节选

The source doesn't tell us that, and in fact there's really no archeological evidence of a group, a large group, entering the land of Canaan at this time.

资料来源并没有告诉我们，事实上，并没有考古学证据表明,有一个部族，大部族在那个时候进入迦南。

耶鲁公开课 - 旧约导论课程节选

If there is a cheap and clean energy source out there, odds are someone--looking in the right place--will find it.

FORBES: America's Best Places For Alternative Energy

"There's no known source of caffeine in temperate zones, so there's nothing we can suggest as a sort of alternative hypothesis at this point except for a human source, " she said.

CNN: Researchers find caffeine in waters off Oregon

But still, there is one source of pressure that is distinctly lacking in China.

ECONOMIST: Beijing wants to clear the air for the Olympics