3. the patterns, tenses, voices, etc. in clauses of a compound sentence should be the same in general y signal and then its generation is described This paper first discusses the characteristic of this This paper begins with the discussion of this signal, followed by the description of its generationthe patterns, tenses, voices, etc. in clauses of a compound sentence should be the same in general. This paper begins with the discussion of this signal, followed by the description of its generation This paper first discusses the characteristic of this signal and then its generation is described ※ 3