The canyon is so narrow and so deep that sunlight shines only briefly at the bottom at midday. That frequent darkness is what has given this canyon its name.
该峡谷是如此狭长幽深，阳光只有在中午才能照到底部。这频繁的黑暗给了这条峡谷名字。

Welcome to Black Canyon of the Gunnison National Park!
欢迎来到甘尼逊黑峡谷国家公园。

Black Canyon seems impossibly steep and narrow. The fast moving Gunnison River formed the canyon over millions of years. As the river flows through the canyon, it drops an average of 18 meters per kilometer. The Gunnison River loses more elevation in its 77 kilometer canyon stretch than the Mississippi River does in 2,400 kilometers from Minnesota to the Gulf of Mexico.
黑峡谷国家公园看上去的陡峭和狭窄得难以想象。快速流动的甘尼逊河历经数百万年形成了这条大峡谷。随着这条河流流经峡谷，河面平均每公里下降了18米。甘尼逊河在这条77公里长峡谷中的海拔落差超过了密西西比河从明尼苏达州到墨西哥湾这2400公里长度的海拔落差。

This loss in elevation causes the river to gain speed and force. Over time, that force has carved and cut the hard rock, and created the wild and jagged rock formations found at Black Canyon. That process is known as erosion.
这种海拔落差导致甘尼逊河聚集了速度和力量。随着时间的推移，这种力量雕塑了坚硬的岩石，并创造了黑峡谷国家公园中天然锯齿状的岩层。该过程被称之为侵蚀。