Think of wetlands as a giant sponge: the earth soaks up a lot of this water that's continually flooding the surface, which increases the amount of water below.
把湿地想象成一块巨大的海绵:地球吸收大量的不断涌向地表的,增加了地表以下水量的这些水。
At about nineteen-thousand meters, the air is so thin and the amount of oxygen so small that a person needs a lot of special equipment to survive.
VOA: special.2011.04.06
That's a lot less than the amount of money out there but they always had fractional reserve of banking anyway.
这比流通的金钱少的多,但是他们总是有部分准备金银行制度。
You know, and within a very short amount of time be able to do a lot of things that that person may never be able to do.
在短时间内,可以做很多,那些只有丰富经验的人做不到的事。
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