to pioneer a frontier area
... Swat valley in Pakistani Northwest Frontier 斯瓦特谷地 to guard the frontier 戍边; 戍边 to pioneer a frontier area 开疆; 开疆 ...
to open up new territory
... 开火 to open fire 开疆 to pioneer a frontier area; to open up new territory 开酒费 corkage fee ...