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科学美国人60秒 SSS 2014-09-30

时间:2014-10-21 08:47来源:互联网 提供网友:gmeng   字体: [ ]
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  At some point we all have to memorize the names of the earth's oceans . But in reality all these waters are connected, so how do we know where one body begins and another ends. Just follow the trash, because the location of   sea-ferrying garbage can be used to define the ocean's borders. That's according to a study in journal chaos1. Historicall speaking the planet's waters were   partitioned into discrete2 oceans for reasons that are geographical3, historical or even cultrual. To approach the problem from a more anatomic perspective, researchers came up with a model of how surface waters move, which is where the rubbish comes in. Flotillas and flots are formed by currents that gather the garbage in large floating patches, but the currents also create barriers that minimize the mixing between different ocean regions. By modeling these  currents, researchers have redefined the borders of the ocean basins based on how readily their waters mix. They find, for example,that a sliver4 of Indian Ocean is really part of the South Pacific. The work should help track the ocean debris5 or even the spread of spilled oil, and it could change the way we see our seas.


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1 chaos 7bZyz     
n.混乱,无秩序
参考例句:
  • After the failure of electricity supply the city was in chaos.停电后,城市一片混乱。
  • The typhoon left chaos behind it.台风后一片混乱。
2 discrete 1Z5zn     
adj.个别的,分离的,不连续的
参考例句:
  • The picture consists of a lot of discrete spots of colour.这幅画由许多不相连的色点组成。
  • Most staple fibers are discrete,individual entities.大多数短纤维是不联系的单独实体。
3 geographical Cgjxb     
adj.地理的;地区(性)的
参考例句:
  • The current survey will have a wider geographical spread.当前的调查将在更广泛的地域范围內进行。
  • These birds have a wide geographical distribution.这些鸟的地理分布很广。
4 sliver sxFwA     
n.裂片,细片,梳毛;v.纵切,切成长片,剖开
参考例句:
  • There was only one sliver of light in the darkness.黑暗中只有一点零星的光亮。
  • Then,one night,Monica saw a thin sliver of the moon reappear.之后的一天晚上,莫尼卡看到了一个月牙。
5 debris debris     
n.瓦砾堆,废墟,碎片
参考例句:
  • After the bombing there was a lot of debris everywhere.轰炸之后到处瓦砾成堆。
  • Bacteria sticks to food debris in the teeth,causing decay.细菌附着在牙缝中的食物残渣上,导致蛀牙。
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TAG标签:   科学美国人60秒  SSS  英语听力
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