Eye-opener 表示惊奇

例句：Of course, John and I have had a few problems, just like most married couples. But I always felt we had a good, solid marriage. So it was a terrible eye-opener when I opened the letter he'd left on the kitchen table and found out he'd run off with his old college sweetheart. 当然，约翰和我是有一些矛盾，就像大多数夫妻一样。但是，我一直认为我们的婚姻是有牢固基础的。所以，当我打开他留在厨房桌上的信，知道他和他以前大学里的女朋友出走了的时候，我真是非常惊奇。

大开眼界

例句：Seeing those color films the astronauts took off the earth on their flight to the moon was certainly an eye-opener. I never realized how beautiful and how lonely our planet looks hanging there in space. 看到宇航员在登上月球时拍的那些有关地球的彩色照片真是开了眼界。我从来也不知道我们的地球在空间是这么美丽、这么孤单。