They grow close to the ground and you get a couple feet of water on them, and they're trash. They're no good. They're worthless.

离地面很近，哪怕几公尺的水位，也足以把它们淹没，变得一文不值。

That narrow band of air may only only be 2000,3,000 feet thick, and if that's the case, then you can just climb or descend a couple thousand feet and be out of it right away.

那片狭窄的空气带可能只有 2000 到 3000 英尺厚，如果是这样的话，那么你可以爬上或下降几千英尺，马上离开它。