Exactly how much exercise we need is a trickier question .

到底我们需要多少锻炼是一个棘手的问题。

Cultural complications make this trickier than it sounds .

文化复杂性让这个问题比表面上更为棘手。

Mr allawi 's task may be trickier .

阿拉维的任务可能更加复杂。

Pinning down the number of actual mobile subscribers has been far trickier .

确定实际移动用户（订阅移动服务的用户）的数量则麻烦的多。

The technology underlying such sites could make them even trickier to deal with than cyberlockers .

这些网站采用的技术方式使其比网络存储网站更难对付。