At this lake, the lake bed grows as water level drops.

在这个湖泊，随着水位下降，湖床升高了。

Gray and white materials within the lake bed are exposed sediments and salt crusts.

河床内部的灰色和白色物质显示出是沉积物和盐结层。

Earlier images of Gusev crater taken from the air seemed to scream with evidence of an ancient lake bed.

早些时候在空中对古谢夫盆地拍摄的图像，就像是在对人们大声宣布那里是一个古代湖床。

Now it's less than a tenth of that size. Left behind are 15, 000 square miles of salty, toxin-laden lake bed.

如今，它的面积已经不到原来的十分之一，只留下一万五千平方英里含盐和毒素的湖床。

That place is what appears to be part of a dried-up lake bed (pictured) just south of the Martian equator.

这个地方似乎是一块干涸湖床中的一部分(见题图)，位于火星南半球靠近赤道的位置。