"She was sworn in by my side in the Oval Office, and then went straight to the Situation Room to get to work dealing with this emergency,"

VOA: standard.2009.05.01

Well, it was not very hard for me to draw this red blood cell here, it's just an oval, and one reason I draw it like an oval, is that that's basically what it looks like if you look at it.

我可以很容易的画出,一个血红细胞,就画个椭圆足矣,因为它看上去就是这个样子的

耶鲁公开课 - 生物医学工程探索课程节选

s plus 1s gives you this oval ellipsoid which is the bonding, and here are the antibonding, and then these are the energy levels that I have been drawing for you.

s和1s上两个电子组成的键合电子成椭圆形,这是成键，这是反键电子，这些是刚刚已经画过的能级,我也给你们画了。

麻省理工公开课 - 固态化学导论课程节选

As he spoke to reporters in the Oval Office, Mr.Obama did not discuss the contents of the review, but he said he and Prime Minister Rudd agree that Afghanistan cannot be a safe haven for terrorists.

VOA: standard.2009.03.24

Mr.Obama discussed nuclear non-proliferation in the Oval Office Tuesday with former secretaries of state George Shultz and Henry Kissinger, as well as former Defense Secretary William Perry and Sam Nunn, former chairman of the Senate Armed Services Committee.

VOA: standard.2009.05.19