在线免费获得高质量的大学教科书非常不错。
We think that availability of high quality, free online college textbooks is fantastic.
它带来了大学教科书、技术手册、服务记录、商品目录。
It will bring college textbooks, technical manuals, service logbooks, and catalogues.
连入互联网的费用会多一些，但是与纸质的程序设计手册、工程参考指南或者大学教科书相比，这些费用可被不到四本书抵消。
Access to the Internet costs more, but compare these fees with just one paper programming manual, engineering reference guide, or college textbook; the cost is absorbed in fewer than four books.
应用推荐