分析和取样方法是对食品进行检验和控制的必要基础。

The methods used for analysis and sampling are the necessary basis for food inspection and control.

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图1中还描述了用于观察执行程序行为的分析框架，通过周期性地对线程取样找出频繁执行的方法。

Also depicted in Figure 1 is the profiling framework that observes the executing program's behaviour by periodically sampling the threads to find frequently executing methods.

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常规的旧书鉴定方法需要提取样本进行检测，这会进一步损害书籍，而分析这些旧书散发出来的气味则完全是无害的。

Conventional analysis techniques require small samples of the work for testing, further damaging the book. But analyzing the gases coming off of the old books is noninvasive.

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