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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In recent years the flow of the river has slowed to a dirty trickle as fresh water running into the river has been replaced with sewage.

近年来，约旦河的流速因肮脏的河水而减缓，因为注入这条河的纯净水变成了像下水道一样脏的污水。

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A trickle of flowing mud may precede a larger flow.

很小的一股泥石流可能会先于更大的流量。

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We are talking about small and medium-sized companies that are emptying their barrels in a desperate shot at winning new customers and a feeble trickle of cash flow.

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However, the inherit low porosity of the shale also implies that once the initial gush dies down, the flow will become a trickle.

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Money poured in at the launch of doi moi, but as reforms moved slowly, if at all, the cash flow slowed to a trickle.

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