Cover Letter和Comments的区别：
1. Comments是自己对自己的.研究和论文的评价和介绍，重要是突出自己研究和论文的特色，让Editor一看就被吸引住了，然后他才看摘要，全文，分配给reviewers。
2. Cover Letter：
Include a letter from the author who will be responsible for correspondence regarding the manuscript as well as for communications among authors regarding revisions and approval of proofs.
The letter should indicate:
The category of manuscript being submitted (e.g. Original Article, Short Report, Letter).
Information on related prior or concurrent submissions to other publications.
A list of at least three referees（每个杂志不一样） list should not name current or prior collaborators.
The direct mailing address, telephone and fax numbers, and e-mail address of the corresponding author.