Sylvia frowned, for all the 'non-popular' people all had lessons and she didn't.
西尔维娅皱了皱眉，很多不受欢迎的人都上过课，只有她没有。
2
The paper illustrates in detail the application of non-popular software in developing CAI courseware and its feasibility so as to provide some new ideas for CAI courseware development.