Today we have ten times as much lead in our blood as did our forebears of a century ago and a 1964 survey carried out at the World Games in Tokyo to measure the amount of mercury in the hair of participants discovered they had at least twenty times what was previously recorded.
今天，鉛在人體血液內的含量，比一世紀前至少增加十倍；日本曾針對一九六四年東京世運選手毛髮中水銀含量做調查，發現比過去至少多出廿倍。