英汉词典

1. 预防措施；防备
    A precaution is an action that is intended to prevent something dangerous or unpleasant from happening.

    e.g. Could he not, just as a precaution, move to a place of safety?...
           就算仅仅是为了以防万一，难道他就不能挪到安全的地方吗？
    e.g. I had taken the precaution of doing a little research before I left London...
           我已在离开伦敦前进行了准备，做了些调查研究。