When you look at a modern map of annual rainfall levels within the United States, you can also more or less spot the 100th meridian line that Powell identified.

当你看美国年降雨量的现代地图时，你或多或少也可以发现鲍威尔所确定的子午线 100 度。

But unfortunately, these winter Atlantic storms simply don't make it far enough to bring their moisture to the Western Plains beyond the 98th and 100th meridian lines of longitude.

但不幸的是，这些冬季大西洋风暴根本不足以将它们的水分带到子午线 98 度和 100 度以外的西部平原。

And the line he drew to mark the boundary between the more wet East and the more arid West was the 100th meridian line of longitude here which was more or less correct.

他在这里画了一条线，标出了比较潮湿的东部和比较干旱的西部之间的分界线，这条线在子午线 100 度上，大致正确。