3 号召性-------- 呼吁读者行动起来, 采取行动或提请注意.
e.g:
[1]. It is time that we urged an immediate end to the undesirabletendency of ……
[2]. It is essential that effective measures should be taken tocorrect the tendency .
4 建议性-------- 对所讨论的问题提出建议性的意见, 包括建议和具体的解决问题的方法.
e.g:
[1]. While it cannot be solved immediately， still there are ways. Themost popular is ……
Another method is …… Still another one is ……
[2]. Awareness/Recognition of the problem is the first step toward thesituation.