This winter they'll interact with an expedition exploring Central America in search of the classic Maya culture.

今年冬天，他们将与探索中美洲以寻找经典玛雅文化的探险队进行交流。

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Another example of mutualism would be the bull's horn acacia tree, which grows in Central and South America.

互惠共生的另一个例子是在中美洲和南美洲生长的牛角相思树。

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For those unfamiliar with the delightful prairie vole, it is a small rodent found in the grasslands of central North America.

对于那些不熟悉可爱的草原田鼠的人来说，这是一种在北美中部草原上发现的小型啮齿动物。

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Historians believe the Maya people of Central America first learned to farm cacao plants around two thousand years ago.

VOA: special.2010.02.17

These "hotspot" areas include Northern Australia, Central South America, Eastern Siberia and parts of the United States and Canada.

VOA: special.2009.12.02

More than two-hundred kinds of songbirds also stop in Cape May on their way to Central and South America.

VOA: special.2009.06.01

In parts of Central America, the percentage of Catholics has slipped below 50%.

WSJ: In Latin America, Catholics See a Lift

The United States reported its last outbreak of foot-and-mouth disease in 1929, while Canada and swathes of Central America have been free of the virus since the early 1950s.

CNN: Foot-and-mouth virus: A global dilemma

It goes back to that central idea of America, that here in this country everybody gets a fair shot, everybody does their fair share, everybody plays by the same set of rules.

WHITEHOUSE: The White House