Colo.

例句：

1. 1. The state of Colorado is known for its beautiful landscapes and outdoor activities.
   科罗拉多州以其美丽的风景和户外活动而闻名。
2. 2. Many people visit the Rocky Mountains in Colorado each year.
   每年，许多人都会去科罗拉多州的落基山脉旅游。
3. 3. Colorado has a rich history and culture, with many famous landmarks and attractions.
   科罗拉多州有着丰富的历史和文化，有许多著名的地标和景点。