英语翻译1.The problem then arises as to the point at which one c

英语翻译1.The problem then arises as to the point at which one can say that these imitations can be considered as speech.2.Every winter,millions of fridges hum away continuously and at vast expense,busily maintaining an artificially-colled space inside an artificially-heated house--- while outside,nature provides the desired temperature free of charge.3.It is,everyone agrees,a huge task that the child performs when he learns to speak,and the fact that he does so in so short a time challenges explanation.