I believe you have a complaint against one of our nurses.

　　我認為你對我們的一位護士有怨言。

　　The police officer was suspended while the complaint was investigated.

　　投訴調查期間，這位警員被暫停職務。

　　Portugal has lodged a complaint with the International Court of Justice.

　　葡萄牙向國際法院提出了申訴。

　　You may refer your complaint to an independent adjudicator.

　　你可以向獨立裁判投訴。