求翻译：由于城市建成区地面多以水泥硬化为主，大大阻碍了天然降水下渗补充地下水进度，因此以回灌方式人工补充地下水就显得十分必要。是什么意思？

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Because urban built-up areas, mainly ground with cement harden greatly impede the natural precipitation progress, thus replenishing groundwater seepage irrigation methods to artificial replenishment of groundwater becomes 10 necessary.

Because built-up urban area ground many by cement hardening primarily, hindered under the natural precipitation to infiltrate the supplement ground water progress greatly, therefore returned fills the way manual supplement ground water to appear extremely essential.

As the urban built-up area ground mostly hardened cement, greatly hindering the natural rainfall infiltration supplement progress of groundwater, to recharge human complement groundwater becomes a very necessary.

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