四角地(Four Corners)是美国的一块独特区域。该区域包括科罗拉多州的西南角、新墨西哥州的西北角、亚利桑那州的东北角以及犹他州的东南角。美国三州交界地有多处,而四州交界地仅此一处,这是四角地的得名原因。四角地空气质量的指示标高耸在新墨西哥州界内的船石(Shiprock)顶峰。只要观察一下船石顶峰是清晰可见还是隐藏在烟雾之中,就可以判 Four Corners is a unique area of ​​the United States. The area includes the southwestern corner of Colorado, the northwestern corner of New Mexico, the northeastern corner of Arizona, and the southeastern corner of Utah. The United States three states at the junction of many places, and four states at the junction of only one place, which is the reason for the name of the four corners. The four-pointed air quality indicator rises above the summit of Shiprock in New Mexico. Just look at the top of the ship’s stone is clearly visible or hidden in the smoke, you can sentence