The book went through a major revision before it was published.

这本书在出版之前经过了一次重大修订。

The first major revision, announced in January 2004, was the iPod Mini.

2004年1月，苹果宣布了第—项重大的改革--推出iPod mini，

We should avoid the necessity of major revision of the command structure in the midst of battle and should adopt one whose basic soundness and flexibility would meet any problem eventuality in combat.

避免在战争中期临时来修正主要指挥机构，而采纳-基础健全又具有普遍适应性的组织，以应付任何战争中可能发生的情势。