近几年，越来越多的在校大学生使用手提电脑。
In recent years, a growing number of students at colleges are using laptops.
起飞后您可以使用手提电脑，但下降时请关闭。
After take-off you may use the laptop computer but not during descending.
结果差别很大，最常使用手提电脑的课堂不一定是最成功的。
The results varied widely, and the classrooms that used the laptops the most often were not necessarily the most successful.
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