backtracking信息详情
v.原路返回；出尔反尔；跟踪（backtrack的现在分词）
cast backtrack───回溯
His arrest sparked fears that the country was backtracking on market reforms.───他被捕一事引起恐慌，国家有关市场改革政策可能会有变动。
He promised there would be no backtracking on policies.───他保证不再改变政策上的决定。
Leonard jumped in his car and started backtracking.───里欧纳德跳上车，原路返回。
However, backtracking is computationally expensive and can easily get out of hand if you're not careful.───然而，回溯计算代价昂贵，如果你不够小心的话容易失控。
At this point, the atomic group will kick in. The engine will discard all backtracking positions.───此时，最小组团就发挥作用了：正则引擎会放弃所有回溯位置。
As I said, there's a lot of backtracking in the story, which may serve to confuse some but is really important to the storyline .───就象我所说的，在整个故事中有不少的“倒带”的把戏，也许会让不少观众感到困惑，但却对主线非常的重要。
Each time the regex finds an intermediate tag and exits a lookahead, it throws away all backtracking positions from within the lookahead.───正则表达式每次找到一个中间标签就退出一个前瞻，它在前瞻过程中丢弃所有回溯位置。
However, the firm is now backtracking and has changed the wording of its original advertisement.───然而，IBM已经收回前言，改变了原始广告的措辞。
The company is backtracking from its more expensive plans.───这家公司在逐步放弃种种耗资较大的计划。