For this reason, PPP is a more reliable comparison for the currencies of economies with similar levels of income.
由于这样的原因，购买力平价方法在比较有相近收入水平的经济体时更为可靠。
This is because, during the original scan, the detectors pick up such a large amount of information that a re-scan need provide only part of the speckle pattern for a reliable comparison to be made.
这是因为在原始扫描期间，探测器采集了大量信息以致于再次扫描时仅需提供部分散斑样式即可进行可靠的对比。
This allows easy and honest comparison between them, and makes it trivial to go back to the old reliable path when the spiffy new one starts showing flaws.
这样就可以很轻易的比较两者，而且当发现新代码有缺陷的时候可以立刻回到旧版本上。
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