edition

1.edition并不是相当于edit的抽象名词，如不可说The edition of his father's letters took him two months，该把edition改作editing。

2.一本书的second edition（第二版）与first edition不一定相同，也不一定不同，third edition与second edition也是这样。假使要表示完全相同，该用second impression（第二次印刷）和third impression。