求翻译：地球表面四分之三都被水所覆盖，然而仅有极少量的淡水资源才能被人们所利用。淡水资源有河水、井水、雨水以至于人们认为淡水资源是取之不尽的。是什么意思？

Three-quarters of the earth's surface is covered by water, but only a very small amount of fresh water resources in order to be exploited. Fresh water resources, wells, rain water that people think that freshwater resources are inexhaustible.

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The earth's surface 3/4 all is covered by the water, however only has the extremely few fresh water resources to be able to use by the people.The fresh water resources have the river water, the well water, the rain water the people thought the fresh water resources are inexhaustible.

Three-fourths the surface of the Earth is covered by water, yet only a very small amount of fresh water resources can be utilized by people. Fresh water resources in river water and well water, rain, so it is believed that freshwater resources are inexhaustible.

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