人生中处处充满挑战，有时候，只有经过漫长的努力才能看到希望的曙光。表达 “the light at the end of the tunnel 隧道尽头的光线” 就用来比喻 “漫长、困难的时期即将结束；苦尽甘来、柳暗花明的迹象”。 比如，想表示 “我看到了一线希望” ，就可以说：“I can see the light at the end of the tunnel. 我能看到希望的曙光。” 

例句

After two weeks of exams, I'm almost through. I can see the light at the end of the tunnel.

连续两周的考试，马上就要考完了。我看到了希望的曙光。

Trust me, when you can see the light at the end of the tunnel, you won't regret spending all day studying. You'll be thankful you did it!

相信我，当你感到苦尽甘来的时候，就不会后悔整天都在学习了。你会感到庆幸的！

The light at the end of the tunnel is that once I pass my tests, I automatically get accepted into university.

给我一线希望的是，一旦通过这些考试，我就自动被大学录取了。