这款iPhone应用程序本身是一款好用的电子书阅读器，不过有一点不爽的是电子教材并没专门为小屏幕设计。
The iPhone app itself is a decent eBook reader, though it suffers from the fact that the textbooks haven't been formatted for the small screen.
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。
But biologic textbook is not the technical bioscience after all and it can't expound the content by the Numbers.
这是一套专门为两年的幼儿园课程编写的四本教材。
This is a series of four books specially prepared for a two-year kindergarten programme.
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