The reason it hasn't caught on yet, he tells me, is that the functionality of e-edition textbooks is incredibly limited, and some students just aren't motivated to learn new study behavior.
出自-2013年6月阅读原文
He calls Inkling a platform for publishers to build rich multimedia content from the ground up, with a heavy emphasis on real-world functionality
出自-2013年6月阅读原文
英语六级真题
On Jan 9, 2007, Steve Jobs formally announced Apple's "revolutionary mobile phone"—a device that combined the functionality of an iPod, phone and Internet communication into a single unit, navigated by touch.
2018年12月六级真题（第一套）阅读 Section C
柯林斯高阶英汉双解学习词典释义
N-UNCOUNT
(计算机等的)功能性
The functionality of a computer or other machine is how useful it is or how many functions it can perform.