在一小时内完成这件工作对一位老师来说不成问题，但对于一个学生来说却是不可能的。

To finish the job in an hour is out of question for a teacher, but it is out of the question for a student.

youdao

youdao

youdao

First, it's pointing to the beginning of the list, which initially might be down here at but after a while, might be part way through. And to that, I simply add a halfway point, and then I check.

列表中间的一个部分了，然后我求出列表的中值点,然后看看该点的值是不是等于目标值，如果是的话就完成了，如果不是的话，如果中位值大于我要找的目标值。

麻省理工公开课 - 计算机科学及编程导论课程节选