The salt water, being more dense, flows upstream under the fresh water which is flowing downstream.

淡水在上层向下流动，比重更大的盐水在下层逆流向上。

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When the fault occurred in the feeder of DG downstream, the fault current flowing through the protection will be increased by the help of DG.

当故障发生在DG下游馈线时，下游保护流过的短路电流将受d G助增电流的影响而增大。

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The swimmer's only exit from the "drowning machine" is to dive below the surface when the downstream current is flowing beneath the reversal.

游泳者唯一能脱离这个“溺死机器”的方法，是潜落到回卷旋涡之下沿向前的水流到下游。

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The Environment Agency has been clearing "pinch points" along the River Thames to ensure water continues flowing further downstream.

BBC: Thames Water says drainage system 'overwhelmed'