实际上海水是取之不竭的，不幸的是淡水总量有限。
We actually have an infinite amount of ocean water; unfortunately we don't have an infinite amount of freshwater.
布罗德·贝克是法国珍珠出口商人。他说，中国淡水珍珠现在占据世界珍珠生产总量的大约95%。
Didier Brodbeck, a French pearl expert, says Chinese fresh water pearls now account for about 95 percent of the world's total pearl production.
目前，农业耕作活动使用了全球70%的淡水资源，排放了超过全球总量13%的温室气体。
Farming practices currently use more than 70 percent of freshwater resources and contribute more than 13 percent of greenhouse gases.
有大量的淡水存在于两极的冰盖中，占到水总量的1.7%，还有1.7%是地下水。
A huge amount is in polar ice, which adds up to 1.7 per cent. A further 1.7 per cent lies in ground water deep beneath the land's surface.
Kwok称：“通过冰层的总量，我们可以计算出每年冰的产生量，并列出一份北极冰盖中所含有的淡水和冰总量的清单。”
Kwok said: "ice volume allows us to calculate annual ice production and gives us an inventory of the fresh water and total ice mass stored in Arctic sea ice."
中国的淡水资源总量处于世界较低水平，人均占有量只有世界平均水平的1/4。
The resource of fresh water in China is in the lower level of the world, which is only 1/4 of the average in the World.
这样，实际上能为人类饮用的淡水，其总量仅仅是全球淡水储量的0.34%。
Thus, can in fact the fresh water which drinks for the humanity, its total quantity is merely the global fresh water reserves 0.34%.
淡水鱼年养殖捕捞总量在六万吨左右。
淡水鱼年养殖捕捞总量在六万吨左右。
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