You use each to refer to every person or thing in a group when you are thinking about them as individuals. You use every to refer to all the members of a group that has more than two members. He listened to every news bulletin. ...an equal chance for every child. Note that each can be used to refer to both members of a pair. Each apartment has two bedrooms... We each carried a suitcase.Note that each and every are only used with singular nouns.

用each指一组中每一个独立的人或事物，用every指两个以上成员构成的一组中的所有成员：He listened to every news bulletin (每次新闻简报他都收听)，an equal chance for every child （所有孩子机会均等）。注意，each 可以用来指一对中的两个，如：Each apartment has two bedrooms (每套公寓有两间卧室)，We each carried a suitcase (我们俩各自拎着一只手提箱)。注意 each 和 every 只与单数名词连用。