Scientists are hot on the tail of one of nature?s most elusive substances, the mysterious dark matter that is thought to make up the bulk of the universe.
But the scope of the investigation has since widened to regions including Latin America, where the company garners the bulk of its sales and profits, according to the person familiar with the matter.
知情人士说，随后调查范围扩大到拉美等地区，雅芳的很大一块销售收入和利润都来自拉美。
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The relativistic mean field theory consistent with bulk properties of nuclear matter is extended to study the excitations of the sound-like collective modes in nuclear matter.