Finally, passing into the vast inky blackness beyond the galaxy, we come upon a gas so tenuous that it scarcely seems worthy of the name, with an average density of only 10–5 atom per cubic centimeter.
Finally, passing into the vast inky blackness beyond the galaxy, we come upon a gas so tenuous that it scarcely seems worthy of the name, with an average density of only 10–5 atom per cubic centimeter.
最后进入银河系之外的一大片漆黑之中，我们遇上了一团稀薄到似乎不应称之为气体的气体，它的平均密度很低，每立方公分只有10-5个原子。