Why is swamp called swamp?

来源: 于 2012-01-11 15:04:58 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

洼................................洋

Slight depression wells ponds lakes reservoirs swamp mud flats stream brook spring marsh tidal branching stream marine glacier rivers waterfalls ocean/sea

After reading

http://en.wikipedia.org/wiki/Swamp

It confirmed my conjecture about its secret