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补录；回溯法
1、tracking eta───跟踪预计到达时间
2、tracking time───[医]跟踪时间
3、postal tracking───邮政追踪
4、tracking polls───跟踪投票
5、evergreen tracking───常绿跟踪
6、cargo tracking───货物跟踪
7、ais tracking───ais跟踪
8、aftershift tracking───后换档跟踪
9、holland tracking───荷兰跟踪
1、The above expression combines character groups, greedy operators, back-tracking, and atomic groups to match nested tags.───以上表达式综合运用了字符分组，贪婪Cao作符、回溯，以及最小化组团来匹配嵌套标签。
2、By back-tracking the pieces, I believe the date and time of the incident was February 4, 2010 at about 6: 49 UTC.───由卫星观测追踪，我相信的日期和事件时间是2010年2月4日星期日，大约6点49分。
3、I have become disgusted with the way he is back tracking on everything.───我已经厌倦了他做事的方式。
4、Take a look at what went wrong by back tracking and thinking about similar past events.───通过回溯和考虑过去的相似的事件，看一看什么地方出了错。
5、DBG supports back-tracking, shows local variables and parameters being passed to all nested function calls at any point of execution.───DBG支持后台跟踪，显示本地变量和在任意的执行点为所有嵌套的函数调用传递参数。
6、Comparing with the outward tracking, the back tracking of Yiwu-Xinjiang-Europe cargo train has not realized the normalization of operation. But to those importers, the strength has appeared.───和去程相比，“义新欧”班列返程还未实现常态化运营，但对于进口商品来说，优势已经显现。
7、He held off the back-tracking Ronaldo and skipped past Alvaro Mejia and Guti before racing into the area and muscling past Sergio Ramos.───他摆脱了从后面追过来的罗纳尔多，跳过了梅西亚和古蒂，然后带球高速前奔，用身体抗过了拉莫斯。
8、The back tracking method is a kind of optimum-seeking retrieval method by which forward retrieval is done according to the optimum-seeking condition to arrive at the goal.───回溯法是一种选优搜索法，按选优条件向前搜索，以达到目标。