To trace the source of meat, or even leather goods, scientists can use DNA barcoding, which uses a short genetic marker from the sample to identify it.

科学家可以使用基因条形码技术（通过来自样本的短基因标记来识别物种的技术），可以追朔肉甚至是皮革商品源于什么物种。

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Listing 3 shows a more verbose trace of a running process (process ID 976) to an output file along with a short extract. The following switches were used.

清单3把一个正在运行的进程(进程ID 976)的详细跟踪发送到输出文件并显示简短摘要。

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Youth is a short dream, when you wake up, it has disappeared was not the least trace was found.

青春时代是一个短暂的美梦，当你醒来时，它早已消失得无影无踪了。

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One should also not stop with the short-run effects of the minimum wage but trace out the longer-run effects on the number of jobs and unemployment rates for affected workers.

FORBES: The Minimum Wage Delusion, And The Death Of Common Sense

Just over 31 years after the event, her son decided to trace his birth mother - Ms Short having notified the adoption agency that she wanted to be contacted if ever her child desired it.

BBC: Clare Short