"Yay Exercise!" "If you want your child to have healthy habits, practice healthy habits too because you're your child's best role model."

VOA: special.2009.11.27

Now, the purpose of this exercise is to give you a little bit of practice in figuring out what these quantities are.

就有这样的结论,这个练习的作用时让你们理解,这些物理量是什么。

麻省理工公开课 - 热力学与动力学课程节选

In the ruling, Weeks found that not only did prosecutors across the state intentionally use the race of a potential juror as a significant factor in decisions to exercise preemptory challenges -- the practice of striking somebody from a jury without explanation, but that the practice occurred in Robinson's case.

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The larger point of this exercise was to clarify and examine each individual argument against the practice.

ECONOMIST: A federal court overturns a Californian ban on gay marriage

In theory, these days are the opportunity for the Commons to exercise its core responsibility to monitor the use of public money - in practice, they're debates on issues raised by select committee reports.

BBC: Week ahead