The diet is based on the premise that grapefruit has an enzyme that burns fat, says Andrea N. Giancoli, a spokesperson for the American Dietetic Association, but that enzyme has never been pinpointed.

美国饮食协会的发言人Andrea n . Giancoli说，这种饮食是以葡萄柚含有能燃烧脂肪的酶为前提的，但这种酶从未被准确地找出。

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U.N.spokesperson Dawn Blalock said the staff members were traveling to the airport when they were hijacked.

VOA: standard.2009.03.16

"We welcome this withdrawal, but emphasize that this is an early step and that stability in the region remains very fragile, " said Kieran Dwyer, spokesperson for U.N. peacekeepers.

CNN: STORY HIGHLIGHTS

No more spokesperson opportunities with Disney or the Rock n Roll Marathon series.

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