Sam has never skipped work before.

山姆之前从未旷工过。

Usually a student has to skip school for a certain number of days before he or she is officially called a truant (truant).

通常一个学生要逃学一定天数，才会被正式称为逃学（truant）。

" You will have not gone ten yards before your mind has skipped away under your very eyes and is larking around the corner with another subject."

“你还走不到十码，你的大脑就已经在你的眼皮底下开小差，去角落里玩弄另一个东西了。”