each day指两天或两天以上中的每一天，强调整体中的个体。every day指日复一日中的每一天，强调由个体组成的整体。each day的意思是：地球清洁日；每一天。every day意思是“每天”，在句中作时间状语。
each day例句
Opening hours are from 10 to 6 each day.
营业时间为每天10点到6点。
Aim to have at least half a pint of milk each day
目标是每天至少喝半品脱的牛奶。
Each day that passed he grew more and more desperate.
他一天天变得越来越绝望。
For each day he spent on the island, he cut a new notch in his stick.
他在岛上每过一天，就在手杖上刻一个新的记号。
She attended a convent school and went to Mass each day.
她上的是教会学校，每天都去做弥撒。
every day例句
We're open from 8 to 7 every day.
我们每天从早8点至晚7点营业。
I go swimming every day in order to keep fit.
我每天游泳以保持健康。
It is important for him to attend every day.
他每天都要出席，这很重要。
It is important that he should attend every day.
他每天都要出席，这很重要。
I go to the store most every day.
我几乎每天都去商店。