In a study published in the journal Ambio, scientists found that lead levels in soil in the North-eastern United States had decreased markedly since the introduction of unleaded gasoline.

在《人类环境杂志》上发表的一项研究称，科学家们发现，自引进无铅汽油以来，美国东北部土壤中的铅含量已经显著下降。

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Conversely, when they activated the clock cells, this communication decreased markedly.

相反，在它们激活时钟细胞后，这种通信明显下降。

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Results: the incidence of portal thrombosis was decreased markedly in therapeutic group.

结果：治疗组门静脉系血栓形成发生率明显下降。

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The Olmert government announced last week that tensions along Israel's border with Syria have decreased markedly.

CENTERFORSECURITYPOLICY: Of men and mice

Arafat leaves behind an uncertain political future for Palestinians, who still have not achieved nationhood and whose standard of living in the West Bank and Gaza Strip has markedly decreased due to corruption and ongoing political violence with Israel.

FORBES: Yasir Arafat Dies