but they did not go out of their way to court such excitement.

但是，他们并非故意寻求这种刺激，

Obviously, it has not been planned for the good of its inhabitants.

显然，现代化的城市不是为居民的利益而规划的。

but belongs to the air, travelling it may be six thousand miles to and from its northern nesting home, feeding its flown young as it flies,

在空中十分自如，可以飞行6，000英里，可以飞往北方做窝的老家，再从老家飞回；一边飞一边喂养会飞的雏燕，甚至在顶风时也能在气流中滑翔，似乎气流在帮它前进。

shape in only two dimensions.

形态只有两种尺度。

Convinced of the importance of education,

深深懂得教育的重要性，

do in fact run out of energy in accordance with the second law of thermodynamics (whether the whole universe does so is a moot point at present).

也都会消耗完其能量（整个宇宙是否如此，目前尚有争论）。