时差N小时 为何月球上没有餐厅(下)

 

 

But more than these kinds of natural processes are needed to have an atmosphere. You also need gravity¹. Without sufficient² gravity, any gases will just leak³ out into space and be gone. Earth loses some of its atmosphere this way, but in general it has enough mass to hold on. The moon, on the other hand, with only one-sixth the gravitational pull of earth, isn't big enough to do the job. Still, recent observations⁴ have shown that the moon does in fact have an atmosphere of its own. It's so thin, however, that it only counts as one in technical terms, and certainly couldn't be breathed. So much for that restaurant.

除了这些自然进程产生氧气外。您还需要重力。没有足够的引力，任何气体都会泄漏到太空，并消失。地球也这样失去了一些大气，但总体来说地球吸引住足够多的大气。月球，从另一方面说，它只有地球的六分之一的引力，无法完成这样的工作。尽管如此，最近的观测表明，月球确实有其自身的大气层。但它是如此之薄，它只能作为一个技术术语计数，而不能被互信。谈到月球上的餐厅就说这么多。

 

1 gravity   

n.重力，引力，地心引力

参考例句：

• An apple falls down because of gravity.由于重力的关系，苹果往下掉。
• The stone rolled down the mountain by gravity.这块石头由于重力作用而滚下山。

2 sufficient   

adj.enough充足的，充分的

参考例句：

• His income is sufficient for his needs.他的收入能满足他的需要。
• Have you had sufficient?你吃饱了没有？

3 leak   

vi.漏，渗；泄漏；vt.使渗漏，使泄漏；n.漏洞，漏隙；泄漏，漏出

参考例句：

• There is a leak in the roof.房顶上有个漏洞。
• There has been a leak of information.走漏了风声。

4 observations   

n.观察资料( observation的名词复数 )；观察力；注意；言论

参考例句：

• His observations gave rise to an animated and lively discussion. 他的言论引起了一场气氛热烈而活跃的讨论。 来自《简明英汉词典》
• He made valuable observations on the prices. 他对物价问题提出了宝贵的意见。 来自《简明英汉词典》