He had a complaint about the delay in delivery.

他对延迟交货提出了投诉。

They received a letter of complaint about the service.

他们收到了一封关于服务的投诉信。

The patient filed a complaint about malpractice against the nurse.

患者对护士提出了渎职的投诉。

I filed a complaint about the poor service at the restaurant.

我对餐厅的糟糕服务提出了投诉。

His complaint about bureaucracy in American universities.

他抱怨美国大学的官僚作风。

Complaint about a woman mechanic

抱怨女技工这个人

We have a complaint about quality.

咱们要起诉质量问题。

She lodged a complaint about the noise.

她就噪音问题提出投诉。

I'm afraid I've got a complaint about this shirt.

我恐怕得要抱怨这件衬衫。

Staff: Okay, and can I ask what is the nature of the complaint (what is the complaint about)?

员工：好，请问您要投诉什么呢？