It shares, with Canada, the second longest river system in North America and has over half the coastline of the United States.
它与加拿大共享北美第二长的河流系统，拥有美国一半以上的海岸线。
2
The emerging system through which private companies maintain toll roads in some states is a classic BOT model.
私营公司在一些州维护收费公路的新兴系统是典型的 BOT 模式。
3
A gut feeling may help you make a quick decision, but one study credits the digestive system for possibly influencing our mental states and behavior as well.