In the constructor function, a new trace file is opened into which the profiling address trace will be written; within the destructor function, the trace file is closed (see Listing 3).

在constructor函数中，会打开一个新的跟踪文件，分析数据的地址跟踪就是写入这个文件的；在destructor函数中，会关闭这个跟踪文件(参见清单3)。

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Its control of each stage of production helps Smithfield to trace back any problems with pathogens and address them.

WSJ: What China Can Learn From America's Hot Dogs

They do not log any information except the current account balance and the bitcoins from many TORwallets can be mixed instantly to a single address in a single transaction to make them extremely difficult to trace.

FORBES: TORwallet Sparks Trust Without Jurisdiction Debate

Often its efforts to trace families of account holders were thwarted as many accounts were opened only with a name and a postal address.

BBC: Jewish woman showing camp number