省事

There are advantages to underground life,too,and something to be said for imaging whole cities,even mankind generally,moving downward,of having the outermost mile of the Earth's crust honeycombed with passage and strue-ture,like agigantic ant hill.

这个句子并不复杂，但不好译。这个句子有三层关系，比较、条件和结果，按这种逻辑关系翻译就十分省事。同今天地面城市里的居民相比，新洞穴里的居民如果在比较健康的生态环境中生活，会有更多的机会见到青枝绿叶。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。