be wary of

例句：

1. 1. We should be wary of strangers approaching our house.
   我们应该对靠近我们房子的陌生人保持警惕。
2. 2. The doctor warned us to be wary of the side effects of the medication.
   医生警告我们要小心药物的副作用。
3. 3. It's important to be wary of online scams and not share personal information.
   小心在线诈骗，不要分享个人信息很重要。