例句與造句

1. In 1258 the commander of the Mongol Hulagu Khan's forces besieging Baghdad was a Chinese General Guo Kan . The Chinese General Guo Kan was then made Governor of Baghdad by Hulagu, who also brought Chinese technicians specializing in hydraulics to engineer the Tigris Euphrates basin irrigation systems.
2. It's difficult to find basin irrigation system in a sentence. 用basin irrigation system造句挺難的