In comparison to her previous novel, this one falls short. [=this one is not as good]与她的上一部小说相比，这部小说要逊色一些。

Her current book falls short of her previous novel.她现在的这部书没她上一部小说写得好。

The cruise fell short of our expectations. [=the cruise was not as good as we expected it to be]这次乘船游览没有我们预想的好。

Their efforts fell short.他们的努力失败了。

Their efforts fell (far) short of (achieving) their goal.他们虽然努力了，但（远）没有达到目标。