求翻译：由于城市建成区地面多以硬化的水泥为主，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？

As more urban built-up area on the ground to harden the cement-based, has greatly impeded the progress of natural rainfall to replenish groundwater infiltration, and therefore artificial recharge of groundwater recharge methods become necessary.

Because urban built-up areas more ground to harden the cement-based, and greatly hindered the natural precipitation seepage progress, thus replenishing groundwater artificial supplements to recharging groundwater becomes 10 means necessary.

Because the built-up urban area ground many hardens the cement 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.

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.