So, even under normal situations, the gene flow among the subpopulations is more of an intermittent trickle than a steady stream.

所以即使在正常条件下，这些亚物种间的基因流动也更像是一条断断续续的细流，而不是一条不停流淌的小溪。

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He makes a run for it, and he's quicker than normal, suddenly an Olympic runner - then he sees his reflection in a stream.

听到这话，亚克托安撒腿就跑。 速度比平时快了很多，突然间变成了一个奥运会的田径参赛者。

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Scar tissue is slow to give up this contrast agent and its signal is therefore retained despite a washing out of contrast from the blood stream and normal tissues.

瘢痕组织排泄对比剂较慢，因此即使血流和正常组织对比剂的排泄后，瘢痕组织信号仍较高。

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The cause of this cold lurch was seemingly settled some time ago when Wallace Broecker, a Columbia University geochemist, suggested that a North American ice sheet collapsed, flooding the Atlantic with fresh water, which interrupted the normal circulation of the Gulf Stream.

WSJ: Matt Ridley on New Support for a Global-Cooling Theory | Mind & Matter

Later in the summer, the jet stream moved back to its normal position and the usual rainfall service was resumed.

BBC: Scotland's summer of two halves

Warm conditions in the Atlantic and cooler conditions than normal in the Pacific Ocean also have forced the jet stream farther north and created a corridor for newly born hurricanes to move unimpeded from the ocean waters up the Atlantic coast, Liu said.

CNN: graphic