The world lying below the heavens; earth.

【古】凡界；地球；大地。

Hades, or the place of departed souls.

地狱；冥府；黄泉。

A region underground or in the ocean depths.

地下世界；海底世界。

The degraded and criminal classes.

下层社会

The side of the earth opposite to one.

地球的另一面。