If something is warranted, there is a good reason for it and it can be accepted.

For a severe cough that lasts more than three weeks, a chest X-ray may be warranted to rule out pneumonia. 对于持续三周以上的严重咳嗽，可能需要胸部X光检查以排除肺炎。

having been given official authority to do something, or done with official permission

They proposed recruiting an extra 50 fully warranted officers to patrol railway stations. 他们提议再招募50名完全授权警官在火车站巡逻。

A warranted search of the property found dogfighting training equipment, and more than 60 dogs. 在用搜查令搜查房屋时发现了斗狗训练设备以及60多条狗。