14.(between observer and horizon)(观察者和地平线之间的)中点
15.to go the distance【拳】赛足回合；打完全场
He fought Tyson early in his career and was the first man to go the distance against him.早年他与泰森打过比赛, 是第一个能跟他打满全部回合的人。
(complete the job)自始至终坚持
More riders than ever are now determined to go the distance.下定决心要坚持到底的骑手比以往任何时候都多。