【求助】这句英语不太懂,扩号里的,请指教,谢谢!
1. An official letter (paper with the heading of the institute, laboratory or company submitting the manuscript) signed by one of the authors, scanned as an image or pdf file.
最后编辑于 2005-07-26 · 浏览 2307
最后编辑于 2005-07-26 · 浏览 2307