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1·The indicative abstract states what the full paper is about and is thus suitable only for review papers, essays, and nonexperimental studies.

说明性摘要描述了全文是关于什么的，并因此仅仅适合于综述论文，随笔和非试验性研究。

2·An indicative abstract indicates the subject and main findings of the paper but it does not go into a detailed step-by-step account of the process involved.

写信息摘要的一个好方法是提取报告每个主要部分的一个或两个句子。