白凡: The last mile is always the most difficult 或者说 The last mile is the toughest one.

或:

For people who have embarked on a one hundred mile journey, finishing ninety miles may only mean they have done half of the effort.

 

上面的译法都有特色. 我a8的翻译如下:

The last is often the hardest.

A miss is as good as a mile.

 

欢迎斧正.