自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
DET 每;各;每一 If you refer to each thing or each person in a group, you are referring to every member of the group and considering them as individuals.
Each book is beautifully illustrated...
Each year, hundreds of animals are killed in this way...
QUANT 每个;每一 If you refer to each one of the members of a group, you are emphasizing that something applies to every one of them.
He picked up forty of these publications and read each one of them.
PHRASE 每一个;各个 You can refer to each and every member of a group to emphasize that you mean all the members of that group.
Each and every person responsible for his murder will be brought to justice...
They can't destroy truth without destroying each and every one of us.
PRON-RECIP 彼此;互相 You use each other when you are saying that each member of a group does something to the others or has a particular connection with the others.
We looked at each other in silence...
Both sides are willing to make allowances for each other's political sensitivities...