最新一期，经济学人里面的一句话“In 1965, mothers spent seven times as long caring for children as fathers did. By 2012 they were spending “only” twice as much time elbow-deep in formula and Pampers.” 自己不理解    elbow-deep in formula and Pampers  的含义，谁能够帮我翻译一下？谢谢  
   原文见：http://www.economist.com/news/united-states/21651833-why-best-educated-women-are-opting-more-children-having-it-all-and-then-some