Five companies account for nearly half of the market for each category, although they tend differ for the various groups, Lannes said.
兰尼斯表示,在每个细分类别的市场,都有五家公司占据了将近半壁江山。
2
The Educational categorygroups the educational and pedagogic characteristics of the learning object.
教育(Educational)范畴包括学习对象的教育性和教育学特征。
3
3 users from each category if testing three or more groupsof users (you always want at least 3 users to ensure that you have covered the diversity of behavior within the group).