pre-,预先，caution,谨慎。

1. We are aware of the potential problems and have taken every precaution.

我们已意识到潜在的问题，并采取了全面的预防措施。

2. I took the precaution of clearing out my desk before I left.

我临走时特地事先把办公桌清理了一下。

3. I took the precaution of locking money in the safe.

我把所有的钱都锁在保险箱里以防万一.

4. 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。

5. I took the precaution of clearing out my desk before I left, and only my private secretary knows it.

我在离开之前预先把桌子整理好了，这一点只有我的私人秘书知道。