每日翻译练习[七六]

It has been hypothesized that much of the matter in the universe is "dark," i.e., unseen. Studies have shown that galaxies in many galaxy clusters are moving faster with respect to one another than they would if visible stars constituted all their mass. The studies suggest that the galaxies are moving under the gravitational influence of unseen mass in considerable quantity.

 

Which of the following is an assumption underlying the passage above?

 

  • Measurements of the speed of moving galaxies are extremely unreliable.
  • The workings of gravitational forces are not particularly well understood.
  • The aggregate mass of visible stars in the galaxies mentioned above can be estimated with some confidence.
  • The general composition of unseen matter in the universe has been determined.
  • Without exception, the galaxies mentioned above move toward one another.

 

————————————————————————

答案:(C)

 

读题:已经被假设,宇宙中的许多物质是暗的,也就是看不见的。研究发现,许多银河束中的星系彼此移动起来要比如果由可见的恒星构成其所有质量时移动起来快。因此研究暗示着星系在相当数量不可见质量的重力影响下移动。

 

问题:下面哪一个是上文所基于的假设?

 

 

a.对移动星系速度的测量相当不可靠

b.重力的工作方式没有被很好地了解

c.可见星星的总重量可以被肯定地估计出来

d.宇宙中不可见物质的大体成分已经被确定

e.毫无例外,上文提到的星系彼此朝对方移动


 

今日音乐

 
邓丽君  《三年》


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