This water would irrigate cash crops like wheat and cotton up to a hundred miles from a river source.

这些水可以灌溉距离河流源头 100 英里的小麦和棉花等经济作物。

Modern exploration of the upper part of the Nile began in about 1837 when Mohammed Ali, the Turkish ruler of Egypt, ordered a search to be made for the river's source.

对尼罗河上游的现代探险大约开始于1837年，当时在埃及的土耳其统治者穆罕默德阿里发布命令探索尼罗河的发源地。