Maybe the languages developed from the same source language long ago, that is, maybe they are genetically related, that was what happened with Sanskrit, Latin and Greek.

也许，这些语言是很久以前从同一种源语言发展而来的；也就是说，也许它们在“基因”上是有联系的，这就是梵语、拉丁语和希腊语的情况。

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Wilson suggested that the long chain of volcanoes stretching northwest from Hawaii is simply the surface expression of a long-lived volcanic source located beneath the tectonic plate in the mantle.

威尔逊认为，夏威夷向西北延伸的火山长链只是一个长期存于板块下、地幔中的火山源在板块表面的表现。

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We lost. Failure has always been the source of long-lasting deep and painful memories of the people of the South.

我们输了。失败一直是造成南方人长久深刻而苦痛的记忆的根源。

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Holbrooke says the long-held notion that Afghanistan's illicit opium trade is the main source of funding for the insurgency is simply not true.

VOA: standard.2009.06.15

(Speaking) Institute director Eric Leonhardt says he's had his eye on the dairy herd as a source of transportation fuel for a long time.

VOA: standard.2010.02.23

The children's TV show "Sesame Street, " long a source of preschool learning, recently launched a new segment, "Elmo the Musical, " which infuses counting, calculations and shapes into singing, dancing and games.

WSJ: Top Math Resources for Preschoolers

To some extent, the Disney influence is filling a vacuum left by the failure of the London stage, so long a source of fresh musicals, to come up with new hits.

ECONOMIST: Disney��s high kicks on Broadway

These explosion proof LED flashlights are ideal for operators in hazardous and non hazardous locations who need a highly reliable yet powerful and long lived source of portable illumination for activities such as utilities repairs and plant inspections.

ENGADGET: Explosion-proof flashlight could be the first to outlive its owner