Making a complaint is quite a simple procedure.
申诉的手续相当简单。
Therefore, when making a complaint, it's essential that you are able to.
因此，需要抱怨时，你有必要。
The patient is making a complaint to the doctor of his bad headache.
病人正在向医生诉说他的头痛。
The patient is making a complaint to the doctor of his bad headache.
病人正在向医生诉说他的头痛。
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