Their work reveals a lot about songbird genetics, and opens a new door to understanding the basis of human speech.

VOA: standard.2010.04.05

It's like the door slams and you got to go into a new room.

这就像是砰的关上门然后走进另一间房间

耶鲁公开课 - 古希腊历史简介课程节选

And as professor Von Heijne says, their understanding of the mechanisms at work has opened the door to others seeking new treatments.

VOA: standard.2009.10.07

That flexibility opens the door to potential new applications, such as what Atwater calls "integrated photovoltaics."

VOA: standard.2010.02.19

The announcement followed a closed-door briefing for NATO foreign ministers by Secretary Clinton on the new Afghan strategy announced by President Barack Obama earlier this week.

VOA: standard.2009.12.05