In a Labor Day speech before union workers on Monday, Mr.Obama said it is time for lawmakers to end the debate over health care and pass legislation for him to sign.

VOA: standard.2009.09.08

Typically, we will not in fact have classes on Fridays, just this week and next for shopping week and Labor Day.

我们一般不在周五上课，只是因为本周和下周是购物周,还有劳动节。

哈佛公开课 - 计算机科学课程节选

Typically, we will not in fact have classes on Fridays, just this week and next for shopping week and Labor Day.

我们一般不在周五上课，只是因为本周和下周是购物周,还有劳动节。

哈佛公开课 - 计算机科学课程节选