英语语法问题Inanexperiment,two-year-oldboysandtheirfathersmadepiedoughtogetherusingrollingpinsandotherutensils.Eachfather-sonpairusedarollingpinthatwasdistinctivelydifferentfromthoseusedbytheotherfather-sonpairs,an

Question

英语语法问题
In an experiment,two-year-old boys and their fathers
made pie dough together using rolling pins and other
utensils.Each father-son pair used a rolling pin that
was distinctively different from those used by the
other father-son pairs,and each father repeated the
phrase “rolling pin” each time his son used it.But
when the children were asked to identify all of the
rolling pins among a group of kitchen utensils that
included several rolling pins,each child picked only
the one that he had used.
and each father repeated the
phrase “rolling pin” each time his son used it到这里有后就有点不明白说什么意思了,尤其这句什么叫做爸爸每次重复孩子使用的擀面杖这个词?那个his son used it修饰time?麻烦翻译一下这句和这句以后的中文

Answer 1

each father repeated the phrase “rolling pin” each time his son used it联系上文,这句是说“每次他的儿子使用了（他们这一组所特定的）擀面杖之后,每位父亲就重复‘擀面杖’这个词”.each time his son used it是一个时间状语从句,相当于when his son used it,这里没有修饰time的说法.
进一步理解就是：“每队父子搭档使用的擀面杖都是明显不一样的,并且每位父亲都在他的儿子使用了擀面杖之后（对儿子）重复“擀面杖”这个单词（这是一个教儿子认识擀面杖的过程）.但是当这些孩子们被要求从一组包括了几根擀面杖的厨具中识别出擀面杖时,每个孩子都只挑出他使用过的那根擀面杖.” (孩子们都不认为其它的擀面杖也算是擀面杖.)