探险: to explore, to go on an expedition, adventure...
景区: scenic area...
优化: optimization, to optimize, to make superior...
归根到底: after all, in the final analysis, ultimately...
敦厚: genuine, honest and sincere...
扎实: strong, solid, sturdy, firm, practical...
气温: air temperature...
协议: agreement, pact, protocol...
讲学: to lecture (on branch of learning)...
志愿者: volunteer...
