He points to the brightest stars and describes how to use them to navigate to the Bilma oasis in the eastern desert.

他指着那些最明亮的星星，讲述怎么利用它们找到位于沙漠东部的比尔马绿洲。

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An oasis is an area of the desert where water may be found.

绿洲是沙漠中可能存在水的地方。

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He points to the brightest stars and describes how to use them to navigate to the Bilma oasis in the eastern desert, where they would trade Onions and garlic for salt.

他指着那些最明亮的星星，讲述怎么利用它们找到位于沙漠东部的比尔马绿洲，在那儿，他们用洋葱和大蒜换盐。

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If you want to dig beneath the hard-scrabble surface of this desert oasis, start with the OriGen Experience.

BBC: Discover life in the Nevada desert

For income-focused investors, Real Estate Investment Trusts have been an oasis in the desert lately.

FORBES: Connect

Then there is the ancient city of Palmyra, another Unesco World Heritage site, whose ruins lay scattered across a desert oasis 150 miles northeast of Damascus.

WSJ: Saving Syria | by Christian C. Sahner