And as Europe's labor force ages and fewer Europeans are born, Lemaitre predicts governments will be pressured into opening their doors to more immigrants.

VOA: standard.2010.01.20

So the Joule free expansion involves opening this valve and asking what happens when this gas moves into the other bulb or distributes between the two.

焦耳自由膨胀就是,打开阀门后的过程,气体从一个腔跑到另一个腔,并在它们之间平均分配。

麻省理工公开课 - 热力学与动力学课程节选

President Obama got a rousing welcome warned as he strode into a large hall for the opening ceremony of the fifth Summit of the Americas.

VOA: standard.2009.04.17

On Thursday, the International Criminal Court announced it was opening a preliminary investigation into the violence - a move hailed by French Foreign Minister Bernard Kouchner.

VOA: standard.2009.10.16