But they say the work will make it possible to safely double the number of visitors permitted inside.

VOA: special.2009.06.29

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

So supposed that the list is not of size 8, let's make it slightly more interesting and double it.

假如列表的大小不是，为了更有趣，使其加倍。

哈佛公开课 - 计算机科学课程节选

Davis ran into more trouble in the fourth, when Nix walked and Overbay drove him in with a double to make it 5-3.

WSJ: Overbay, Suzuki power Yankees past Royals, 11-6

After Coffman's leadoff homer, the Lions briefly held the lead in the first after Joey Falcone hit a two-run double to make it 2-1.

WSJ: Coffman leads Arizona St. past Columbia 10-5

McCoy had wanted a big return at Cheltenham along the lines of his 1997 Champion Hurdle-Gold Cup double on Make A Stand and Mr Mulligan.

BBC: Tony McCoy