reason

• 理由充足

  have sufficient reason

• 正当的理由

  legitimate reason

• 不能成立的理由

  unfounded reason

• 令人信服的理由

  convincing reason

• 宣战理由

  grounds for a declaration of war

• 根据什么理由？

  On what grounds?

• 毫无理由

  absolutely no reason

• 没有理由来反对

  no reason to oppose

• 缺乏足够的理由

  lack ample grounds

• 完全有理由相信

  definitely grounds for believing

• 说明拒绝的理由

  explain the reason for refusing

• 他提出理由赞成我的意见

  he put forward some reasons to support my opinion

• 我有自己的特别理由。

  I have my own reasons.

• 他不同意我的意见，理由是我的看法不全面。

  The reason he disagreed was that he thought my views were not comprehensive.