誰幫忙翻譯一下這個短語 The baseline position
誰幫忙翻譯一下這個短語：
The baseline position
肯定不是直接翻譯,應(yīng)該是個俗語什么的吧,謝謝了先.
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For example, PARS is putting this into practice for the world's largest mail company, the United States Postal Service (USPS).

The baseline position(原文這里是加重的，感覺向標題一樣)
The USPS serves one of the most mobile markets in the world, with about 17 per cent of US citizens moving house every year. This resulted in 40 million address changes in 2001 alone. The number of wrong deliveries caused by out-of-date addresses being used is correspondingly high, with 1.3 billion letters being returned to sender each year. That means high costs for the postal service and the annoyance of late deliveries for their customers.
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