If a language supports continuations , the programmer can add control constructs like exceptions , backtracking , threads and generators .

如果一种语言支持后续（continuation）的话，编程者就可以添加诸如异常、回溯、线程以及构造函数一类的控制构造。

Backtracking on a previous ruling : this is not the first time that china has tried to regulate the blurry line between virtual and real-world economies .

回溯先前的法规：中国已经不止一次试图控制虚拟和真实世界经济之间那条模糊的界线了。

Lamenting the " continuous backtracking and lack of implementation " of the power-sharing pact , mr zuma said the situation in the country could no longer be tolerated .

祖马感叹权力分享协议“连续回溯和执行不力”，表示对该国的局势不能再容忍了。

The backtracking base construction is an important foundation for the reference room to realize the modernization of book management .

回溯建库工作是图书资料部门实现图书管理现代化的重要基础。

When a dead end is reached , no more recursive calls are made and the recursion returns to where it was called from ( recursion handles the backtracking for you ) .

当一个死胡同出现，不再递归调用，并且递归返回它是从哪里开始调用的（递归为你保存的回溯路径）。