The consultant approved the plan, with one caveat: avoid signing contracts before legal review.

顧問核准了這項計畫，但有一項告誡：在法務審查前不要簽約。

Before booking, travelers should note the caveat that nonrefundable fares cannot be changed later.

訂票前，旅客應注意一項警告：不可退款的機票之後無法更改。

The manager's only caveat to new hires was never to share client passwords by email.

經理對新進員工唯一的告誡是：絕對不要用電子郵件分享客戶密碼。