两个站点均运行日志捕捉和应用程序，但在这个经过简化的场景中，数据仅进行单向复制，即从主站点复制到备用站点。

Running at both sites are log-capture and apply programs, but in this simplified scenario, data is only replicating one way — from primary to standby.

youdao

DB 2跟踪实质上是运行跟踪程序时捕捉到的控制流信息(函数和相关参数值)的日志。

A DB2 trace is essentially a log of control flow information (functions and associated parameter values) that is captured while the trace facility is on.

youdao

使用一个代码路径运行应用程序，并捕捉它的SQL。

Run the application using one code path and capture its SQL.

youdao

They're easy to spot, you can't run the program with them there, so you're not going to get weird answers.

它们很容易被捕捉到，你没法带着这些错误去运行程序，因此你不会得到奇怪的答案。

麻省理工公开课 - 计算机科学及编程导论课程节选

it's not as good as helping debug, sorry, that's the wrong way of saying it's not as good at catching some things before you run them, it is easier at some times in debugging as you go along on the fly.

它在帮助我们调试方面可能不是太优秀，对不起，这么说有点不正确,它在运行前捕捉错误,可能不是那么优秀，可能边运行边调试,会更容易一些。

麻省理工公开课 - 计算机科学及编程导论课程节选