In recent months, persistent ridges of high pressure have been driving storms away from the south central United States, leaving that region parched while drenching others with unusually heavy rain.

近几个月以来，大气层持续的高压送走了美国中南部的暴风雨，却使得该地区变成了焦土，并使得美国其他地区遭受罕见的大雨。

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Inside was a green paste, waxy in lustre, the odour curiously heavy and persistent.

里边是一种绿色的软膏，有蜡质的光泽，气味浓郁，而且经久不散。

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The prevalence of persistent cough and phlegm is the highest in heavy pollution area and decreases with pollution reducing.

重污染区内持续咳嗽、持续咳痰的现患率最高，并随着污染程度的降低呈下降趋势。

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Parts of north Wales and the Midlands have been hit by more persistent heavy rain, which will move across the Midlands as Sunday progresses.

BBC: Saturday's record temperatures not beaten

The spokesman added that a "close eye" would be kept on the situation, especially in the area downstream of Oxford, where the flood risk would be the greatest if there is heavy and persistent rainfall.

BBC: Flood warnings remain in many areas