同学你好，该知识点来自沪江网校《英语零基础直达大学六级【双11专享特惠班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
at an end 结束;终结，at表示处于某种状态，比如
When our day's work was at an end we hastened there.
当天工作一结束，我们就急忙赶到那里。
The road was shiny with puddles, but the rain was at an end.
马路上到处是水洼，闪着光，不过雨停了。

It looks as if the world were at an end. 看起来好像世界到了尽头。看起来好像世界末日。

祝同学学习进步~