But biologic textbook is not the technical bioscience after all and it can't expound the content by the Numbers.
但是，生物学教材毕竟不是专门的生物科学史，它不能系统地阐述这些内容。
2
Broadband access had become ubiquitous, and textbook companies had converted their standard introductory course content into inexpensive, Web-friendly form.
宽带接入无处不在，教科书公司已经将他们的标准入门课程内容转换成便宜的网络友好格式。
3
Their use of classroom time expounded on the textbook is still not enough, explain the meaning of to help students understand and grasp the text's focus on content.