你可以在周二或周三的下午给我打电话翻译成英语怎么说,

You can call me in the afternoon on Wednesday or on Tuesday.

You can call me on Tuesday or Wednesday afternoon 不能用in

on Tuesday afternoon 和in the afternoon of Tuesday 都是对的

You can call me in the afternoon of Tuesday or Wennesday.

显然这是口语中的句子,所以尽可能避免on the afternoon of Tuesday or Wednesday的用法,可以这样说：
You may call me (on) Tuesday afternoon or Wednesday afternoon.这里on也可省略