2014.4.23【英译中】Why We Can’t Walk Through Walls

maggiewujia (maggiewujia)
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发表于:2014-04-29 03:32 [只看楼主] [划词开启]
Why We Can’t Walk Through Walls
我们为何不能穿墙?

Shadowcat! She’s one of the X-Men, and she can walk through walls!
幻影猫!X战警中的一员,可以穿墙而过!

Unfortunately, however, Shadowcat can’t be real. This is because she violates a basic law of physics that says two things can’t share the same space. 
不过,如此炫目的角色却并不真实。因为这一设定违反了一条最基本的物理法则,即两种物体不能齐聚同一空间。

But aren’t atoms mostly empty space? Couldn’t she just slip into that space? Unfortunately, no.
原子之间不是有很多空隙吗?幻影猫就不能穿过这些空隙吗?遗憾的是,她不能。

It’s true that atoms are mostly empty space. (If a helium atom were the size of the earth, the electrons would be out in earth’s atmosphere, and the protons and neutrons would be the size of a basketball at the core.) 
原子之间的确有很多空隙。(如果一个氦原子有地球那么大,那么电子则位于地球的大气层,而处于氦核的质子和中子仅有篮球大小。)
But atoms can’t overlap because only a limited amount of electrons can be in the same orbit.
然而,由于可在同一轨道上运行的电子数是有限的,原子无法重叠在一起。
The reason for this is what’s called the Pauli Exclusion Principle. Electrons have ‘spin’. Picture a screw. Its threads go in one direction, right? So imagine the screw turning in the direction of its threads, like how it screws into a board. Now picture placing two screws side by side, but pointing in opposite directions. Their spins are the reverse of the other, and you can get them close together.
泡利不相容原理解释了这一点。它指出,电子有一种自旋属性。想象一枚螺丝。它的螺纹是不是向着一个方向延伸?假设将这枚螺丝拧进一块木板,那么它将沿着螺纹的方向旋转。现在,并排放置两枚指向相反方向的螺丝。由于自旋方向彼此相反,旋转的过程会使它们紧密地结合在一起。
But the Pauli Exclusion Principle only applies to particles like the ones in atoms. There are other types of particles, such as the ones that make up light, which can be in the same place at the same time.
但是,泡利不相容原理仅适用于原子中的粒子。而其它种类的粒子,如组成光的粒子,则可以重叠在一起。
分类: 英语
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