建议信和翻译如下：
Dear President：
I am a student of Class Seven，Grade Two of our school。I am writing to share some advices with you。We all know that study is the most important task for senior students，so it's necessary for us to spend most of our time in study。
However，proper rest is necessary for us as well。But in our school，we only have a short night to rest，which I think it's not good to us。
I did a survey in our school that collect the ideas about having a longer rest every week。Almost all students say that they need more time to rest and relax。Therefore，according the opinions of our students。
I would like to advise that set an afternoon and a night for students to have a good rest。Proper rest can help students focus on study better。I will be more than happy that you could accept the suggestion。
Sincerely yours，Canny。
翻译：
亲爱的主席先生。
我是七班的一名学生，我们学校二年级。我想与你分享一些建议。我们都知道，学习是学生最重要的任务，所以我们有必要将大部分时间花在研究上。
然而，适当的休息对于我们也是必要的。但在我们的学校，我们只有一个短暂的晚上休息，我觉得这对我们是不好的。我做过一项调查，收集意见关于我们学校每周有更长的休息时间。几乎所有的学生都说他们需要更多的时间来休息和放松。
因此，根据同学们的意见，我想建议设立一个下午和同学好好休息一晚上。适当的休息可以帮助学生更好的专注于学习。我会多高兴你能接受这个建议。
你诚挚的，Canny。