a river that rises in northern West Virginia and flows north into Pennsylvania where it joins the Allegheny River at Pittsburgh to form the Ohio River
例句
用作名词 (n.)
The boat navigated the Monongahela, then followed the Ohio to Cairo, Illinois, where it joins the Mississippi. 该船经过莫农加希拉,然后沿着俄亥俄河行驶到伊利诺伊州的凯罗,在这里它进入密西西比河。