Cnn has a table of p / r ratios for 54 american cities from the summer of 2007 , which includes long-term averages .
美国有线电视新闻网（cnn）有一个美国2007年夏天54个城市p/r比值表，表中还包含长期平均值。
Even so , biologists still assign the same age-length ratios to lobsters from all locations , says biologist carl wilson of the maine department of marine resources in west boothbay harbor .
If you want more info , check out this july article from time , or this april article at the new york times ( which contains p / r ratios for major u.s. cities from the end of 2009 ) .
