Lake Chad Basin is the largest inland lake.

乍得湖则是内陆盆地的最大湖泊.

It's Lake Chad. When my mother was born, Lake Chad used to be about 25,000 kilometers square of water.

它就是乍得湖。在我妈妈出生时，乍得湖曾经有大约两万五千平方公里的水域。