桥的一端，桥头哨兵的身外，看不到任何人的踪影；铁道线平直地向外延伸，进入森林百米的深处，然后转个弯，消逝于视线之中。
Beyond one of the sentinels nobody was in sight; the railroad ran straight away into a forest for a hundred yards, then, curving, was lost to view.
通常来说，宇宙微波背景辐射粒子先发生了蓝移（它们的峰向光谱的蓝端移动），但当它进入超星系团之后又发生了红移。 这两个效果相互抵消。
Normally a CMB photon is first blueshifted (its peak shifts towards the blue end of the spectrum) when it enters the supercluster and then redshifted as it leaves, so that the two effects cancel.
如果行星处于可居住区的更冷(外)端，它或许会进入冰冻和解冻周期。
If the planet is on the cooler edge of the habitable zone, it could go through cycles of freezing and thawing.
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