An appeal is a serious and urgent request.
呼吁 • He has a message from King Fahd, believed to be an appeal for Arab unity. 他有个来自法赫德国王的口信,相信是对阿拉伯团结的呼吁。
If you appeal a decision to someone in authority, you formally ask them to change it.
申诉 • We intend to appeal the verdict. 我们打算对此裁决提出申诉。