Living in a colony helps naked mole rats find enough food, but when so many animals live in the same underground space, oxygen quickly runs out.

居住在这样的一个能够找到充足食物的群落里，但是大量的动物同时居住在一个空间里氧气很快就会被耗尽。

The underground spaces seem to attract every eccentric passion. A small and ancient man with a Bible , an American flag and a megaphone haunts the subways of Manhattan.

地下的空间似乎能够吸引每一种怪异的激情。一个身材矮小、穿着古旧的人总会拿本圣经、带着一面美国国旗和一个扩音器出入于曼哈顿的地铁。

" Shanghai's foundations are built on soft soil- so building multistoried spaces underground would be like digging holes in a piece of bean curd, " the government reports said, " the difficulties are easy to see" .

“上海的地基建在软土上——所以在地下建造多层空间就像在一块豆腐上挖洞，”政府报告说，“困难显而易见”。