The vernal equinox, however, occurs when the center of the sun crosses the Equator.

当太阳中心横过赤道之时，便是春分。

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However, no one really knows, since the center of the Sun can never be directly observed.

不过，对此谁也不能真正搞清楚，因为人们决不可能。

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Regular hydrogen fuses very, very slowly even in a place as unimaginably hot as the center of the sun.

普通氢非常，非常缓慢即使在一个地方像在太阳中心一样无法想像的热。

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Shuttle Discovery left behind a pink and gold plume of smoke as it took off Sunday evening, with the sun setting on the Kennedy Space Center in Florida.

VOA: standard.2009.03.15

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Sitting in the center of the so-called Sun Belt, the country is part of a vast, rainless region reaching from the western edge of North Africa to the eastern edge of Central Asia that boasts the best solar energy resources on Earth.

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At the University of Yangon, Ni Ni Myint, director of the Historical Research Center, gazes across the sun-dappled lawns and tree-lined lanes of the busy campus.

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