资料来源 : pyDict

汇流区

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Doab \Do"ab\, [Pers. & Hind. do[=a]b, prop., two waters.]
   A tongue or tract of land included between two rivers; as,
   the doab between the Ganges and the Jumna. [India] --Am. Cyc.