diagnose

He could diagnose an engine problem simply by listening.

他仅靠听就能判断发动机出了什么问题。

This product is not intended to diagnose, treat or prevent any disease.

此产品并不供作诊断、治疗或预防任何疾病之用。

You can also diagnose your weaknesses with this simple exercise.

这样的简单练习还可以诊断你的缺点。