Pittsburgh: A city of southwest Pennsylvania at the point where the confluence of the Allegheny and Monongahela rivers forms the Ohio River.

匹兹堡，美国宾夕法尼亚州西南部的城市，在此阿尔勒格尼河与莫农格黑拉河的交汇形成了俄亥俄河。

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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。

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In nineteen twenty,Congress created the Monongahela National Forest.

VOA: special.2009.07.20

Both the Upper Delaware and Monongahela rivers sit on an area called the Marcellus Shale, which lies beneath large parts of Pennsylvania, New York and West Virginia at a depth of 5, 000 to 8, 000 feet, according to the Pennsylvania Department of Environmental Protection.

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