通商
(of nations)have trade relations
訂立～條約conclude a trade treaty;sign a treaty of commerce/《關(guān)于中國西藏地方和印度之間的～和交通協(xié)定》(其中第一次提出和平共處五項原則，1954年4月29日)Agreement between the People’s Republic of China and the Republic of India on Trade and Intercourse between the Tibet Region of China and India/～航行commercial shipping/～航海條約treaty of commerce and navigation /～口岸trading port;open port