所以这部分内容需要包含如下几点:(1)What do we know about the subjects?Only relevant information should be provided;don’t write a review.(2)What we don’t know.(3)Rationale:Why you want to do it?Don’t repeat abstract.(4)Approaches:How you are going to do it.(5)Significance Make an appeal to general readers.有一点很重要,即不能把Introduction写成综述review,避免参考资料内容已有的结论全部写进你的Essay中。