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。