A few precautions can help most climbers avoid altitude sickness.
出自-2012年12月听力原文
柯林斯高阶英汉双解学习词典释义
N-COUNT
预防措施;防备
A precaution is an action that is intended to prevent something dangerous or unpleasant from happening.
例句
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?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。