delphi string 超过255个字符怎么办？

var MyString:string;

MyString := 

  'ThisStringis' +

  'ofLength256' +

  'And ManyManyManyManyManyManyManyManyManyManyManyManyMany' + 

  'ManyManyManyManyManyManyManyManyManyManyManyManyMany' + 

  'ManyManyManyManyManyManyManyManyManyManyManyManyMany' + 

  'ManyManyManyManyManyManyManyManyManyManyManyManyMany' + 

  'ManyManyManyManyManyManyManyManyManyManyManyManyMany' + 

  'ManyManyManyManyManyManyManyManyManyManyManyManyMany' + 

  'ManyManyManyManyManyManyManyManyManyManyManyManyMany' + 

  'ManyManyManyManyManyManyManyManyManyManyManyManyMany' + 

  'CharactersCharactersCharactersCharactersCharactersCharactersCharactersCharacters';