They are found from British Columbia, Can. , south to Guatemala and from the U. S. states of Arkansas and Kansas westward, usually in desert or semi-desert sandy country.

分布于从加拿大不列颠哥伦比亚向南至瓜地马拉，以及从美国阿肯色州和堪萨斯州向西至太平洋沿岸一带。

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The Soviet planners who re- drew the map in the 1920s divided Central Asia broadly along linguistic lines, hoping to construct nations from the various nomadic and semi-nomadic tribes of desert and steppe by exaggerating the differences between their dialects.

ECONOMIST: Central Asia

The three semi-desert states, which border Niger, Chad and Cameroon, are roughly the size of England or the US state of Illinois but have a population of just 10 million.

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The Bank claims that exploiting oil resources is one of the few development options open to Chad, where 80% of the people live on less than a dollar a day, and 90% of the country is desert or semi-arid.

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