Ok, double line. If there are no questions I'm going to make a dramatic change in topic.

好的，这是重点，如果没什么问题,我要讲下面的内容。

麻省理工公开课 - 计算机科学及编程导论课程节选

If you double everything in the system, the temperature is not going to change, it's not going to double.

如果你把系统中所有的东西增加一倍，温度是不会变的，它不会跟着增加一倍。

麻省理工公开课 - 热力学与动力学课程节选

Ferguson made a double change on the hour, sending on Carlos Tevez and Wes Brown for Berbatov and Gary Neville.

BBC: Man Utd 3-0 Celtic

With a trip to Manchester United looming on Saturday, Wenger made a double change with 19 minutes left, sending on Arshavin and Jack Wilshere for Eduardo and Eboue.

BBC: SPORT | Football | Europe | Arsenal 3-1 Celtic (agg 5-1)

As United held firm, with an ever-present menace on the counter-attack, Ancelotti made a double change with 20 minutes left, replacing Yuri Zhirkov and Drogba with Florent Malouda and Nicolas Anelka.

BBC: Chelsea 0-1 Man Utd