finish是什么意思

  例句：
1，i was pushing hard until about 10 laps from the finish.离终点约十圈以前我一直非常努力。
2，he surged into a winning lead 200 metres from the finish.他奋力冲刺,在距离终点200米处取得获胜所需的领先地位。
3，when does he finish his college course?他何时大学毕业?
4，the climb nearly finished me off.这次爬山几乎送了我的命。