Mysteries of the sea

Mysteries of the sea
The sea is the largest unknown part of our world.it covers 71 percent of the earth.there is still much to be discovered about this
vast blanket of water.
Some scientists are studying ways of bringing the ocean's huge supply of water to the deserts of the word
Others hope to control the weather by learning more about the exchange of heat and moisture between the ocean and the air.Still others are studying the ways in which sound travels and is affected by water and heat.What happens when sea water touches different elements is another subject of study.There are just a few of the questions to which oceanographers are devoting their energies
One of the most ineresting projects in oceanography is the work of mapping the ocean floor.Only a very small part os it has been mapped .This was not important when only surface ships sailed the world's oceans,but it can mean the difference between life and death to men in submarines
Long ago there was only one way to find out how deep the ocean was.
A sea-man could throw a weighted rope over the side of his ship.Then he pulled the rope up after it had reached the bottom.
but this was not a very exact way of measuring.
In the twentieth century a better way was found.sound was used to measure the ocean .An American Navy ship sailed into a narrow strip of water to conduct an experiment.seamen dropped a number of devices that would burst with a loud noise when they hit the bottom.And a little instrument that had been invented measured the time it took for the sound to reach the ship.This has helped oceanographers map the ocean floor.
Underwater photograph is also important in mapping parts of the ocean floor.with the new methods that have been perfected,cameras can take pictures of the underwater valleys,even in color.
If the waters of the ocean could be moved away,the sea floor with its wide valleys,uneven mountains and submarine rivers would be an unbelievable sight.Around the edges of the continents the ocean floor is flat and the water does not become much deeper for about thirty miles.Where there are high young mountains along the coast,this flat part may be much less than 30 miles.But where rivers flow into the sea,the flat area nay extend foe hundreds of miles.
The region near the continents,where the water is not so deep,is the place where the ocean's greatest riches in marine life are found.Below these living creatures and plants are the largest known quantitise of minerals.
At the end of the flat part the sea floor suddenly drops down,forming deep hollows which are shaped like bowls.these huge hollows hold most of the world's water
Imagine,if you can,a mountain chain stretching 40,000 miles around the earth.it is hard to believe that this great underwater chain of mountains encircling the earth was discovered only a few years ago.
（英译汉）：我的分不多，因为只有这么多，

海的神秘
在我们的世界里海是最大的未知区域.他覆盖了地球表面的百分之七十一.这大片的水层(渣翻译,请鄙视,反正就是说海）仍然有很多需要探索的东西.
一些科学家正在研究关于如何将海中大量的水补充至世界的沙漠中.
其他的希望能通过学习关于热流交替和在海与空气之间的水气来控制天气.还有其他人正在研究声音的传递如何被水和热量影响.当海接触到不同元素时候会发生什么也是另一个需要研究的项目.海洋学家只致力于研究少数的问题.（说的是上面那些提到的项目吧,大概.）
在海洋学之中最有趣的项目就是绘制海洋层（貌似海底.）.只有非常小的一部分海洋被绘制过.而当只有船航行于世界的海的表面时,这个显得并不重要,但是对于潜水艇和相关人员来说,这将关系与他们的生命.
很久以前这里只有一种办法来了解海的深度.
一位海人（再次渣翻译,反正就是……海的男人![握拳]) （应该是是熟悉海的人吧.)可以把一根被重物拴住的绳子从船上扔进海中,当到底之后再把绳子拉上来.
但是这种测量方式并不精准.
在二十世纪,一种更好的方式被发现了.使用声音来测量大海.一艘美国海军船航行入一片狭小的海域进行试验.海人（悲剧啊悲剧.）扔下一定数量的机械,一旦接触到海底表面,那些机械将会发出很大的噪音.然后再使用一个被发明用来测量声音接触到船的时间的小器械.这个已经给予了海洋学家们在绘制海底地图时候需要的帮助.
在绘制海底地图时,水下摄影也是很重要的一部分.使用一种已经被完美的新的方式,摄像机可以在海底拍摄照片,甚至是彩色的.
如果海中的水可以被移走,拥有宽大峡谷,山和海底河流的海底将会变成一副不可置信的光景.在各洲（比如说美洲啊亚洲啊欧洲啊澳洲啊白米洲啊之类的.）的边缘海底会很平整,并且水深不会超过三十英里.但是在河流的进入点,平整的区域可能会延伸近百英里.
各洲附近的区域,水并不深,可以找到非常丰富（品种.）的水下生命.在这些生物和植物之下则是目前所知的最大量的金属.
在平整区域的尽头海底会突然降下,形成像弓一样的深深的凹陷,这些巨大凹陷（就是坑!）存着世界大部分的水.
想象一下,如果你能,一座在环绕地球并延伸四千英里的连续的山（第三次渣翻译.不是山脉,但就是一堆山.）.难以相信这环绕地球的水下的巨大连续的山只是刚刚在几年前被发现.
弄完了一看全文都渣翻译.楼主同学你凑合看吧.抱歉了.
还有,不用加分了.不值得.