绿洲如何形成 How Does An Oasis Form?

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在埃及西北部距离利比亚边境仅数十公里的大漠深处,有一个被称为“世外桃源”的地方——“锡瓦绿洲”。上百万棵椰枣树,大片大片翠绿的橄榄林,数千口清澈透明的泉水池,包括一代艳后克里奥佩特拉沐浴的泉池,以及一代枭雄亚历山大的神庙、堪称“埃及死海”的盐水湖……这一切,都使锡瓦绿洲弥漫着不可思议的神秘色彩,它仿佛一颗璀璨夺目的明珠,镶嵌在埃及西部边陲的沙漠腹地。

This is Siwa.

It's a crowed place with bustling markets and around 33,000 people.

Here you can find farms which grow things like dates and olives and trees grow as far as the eye can see.

Siwa has been permanently inhabited since the 10th millenium BCE or for roughly 12 thousand years.

The city contains several archaeological sites and is even the site of an oracle temple for the Egyptian deity Amun.

What's all about Siwa is that it's located here, completely isolated in the Egyptian portion of the Sahara desert.

The nearest big city is 460 kilometres away in Alexandria, and the ocean at its closest is 260 kilometres away.

This deep in the desert, Siwa receives only 9 inches of rainfall a year, and temperatures in the summer have reached a blistering 118.8°F.

Just outside the limits of Siwa, tremendous and imposing sand dunes linger, constantly threatening to advance.

So how can a place so deep in the desert be so rich with people, vegetation and history?

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