The biggest problem is lack of irrigation.

最大的问题是缺少灌。

Villagers use every stream pouring down from the mountains to irrigate tier upon tier of terraces carved into the precipitous slopes.

村民们利用从山上倾泻下来的每一条溪流，灌建在陡峭山坡上一层又一层的梯田。

A subterranean network of canals known as karez is used to channel water around Turpan streets and into raving yards.

这里有俗称坎儿井的地下水道，他们在土鲁番开凿水道引水灌葡萄园。

Most important of all, the Amazon irrigates the largest tropical rain forest on Earth.

最重要的是，亚马逊河灌着地球上最大的热带雨林。

We plan to set up a modern system of irrigation.

我们计划建立一个现代的灌。

Those kinds of crops help farmers survive. Irrigation can also help farms.

这种物帮助农民们下来，灌也能帮助农场。

The past 50 years of over-farming a lot of land has created real problems on the global basis in terms of having enough irrigable farmland.

过去50年过度耕种的土地在全球范围内造成真正的问题，因为有足够的灌农田。

Declining water tables will mean increased pumped irrigation.

地下水减少意味着抽水灌增加。

What we do is irrigate book deserts.

我们所做的就是灌图书沙漠。

But people have diverted lots of that water for agriculture.

但是人们把大量的水引走用于农业灌。

Irrigated by a special system that delivers the precise amount needed to each plant.

通过一个特殊的进行灌，为每株植物提供精确的灌量。

His fields of ice supply perfectly timed irrigation water.

他的冰地提供非常及时的灌用水。

Because water just evaporates from overwatered lawns. But how much?

因为水分会从过度灌的草坪上蒸发掉。但到底会蒸发掉多少呢?

In agriculture, it will take both better breeding—for more water efficient crops—and smarter irrigation.

在农业中，既要培养更多能高效利用水资源的优良物品种，也要加强建设智能灌。

Diesel alone, which powers the pumps irrigating Egypt's farms, accounts for $7.5 billion in subsidies and is sold to consumers at the equivalent of 16 cents a litre, whereas most Europeans pay $2 or more.

在埃及，单单是用于灌的柴油补贴，每年就有75亿美金。在埃及，这些柴油以相当于16美分每公升的价格卖给消费者，然而在欧洲，消费者需要支付两美元或者更多。

In the north-western regions that are India's most arid, such as Rajasthan and Gujarat, the baolis underwrote life, as sources of both irrigation and drinking water.

在印度最干旱的西北地区，如拉贾斯坦邦和古吉拉特邦，baoli为灌和饮用水的来源，支撑人们的生。

The irrigation equipment is still there.

灌设备仍在。

We put in cisterns to irrigate.

我们还放水箱进行灌。

They help provide irrigation and hydropower and protect communities from flooding.

它们提供灌和水力发电，并保护社区免受洪水侵袭。

That's one of the reasons why, when we use it as a hydroponic medium, we like to irrigate it constantly, so we're always dripping water through that perlite to make sure that there's water being supplied to the plant roots.

这就是为什么当我们使用它为水培介质时，我们喜欢不断地灌它， 这样我们可以通过珍珠岩确保有水供应到植物根部。