The U.S.presence,Mr.Obama said, will shift from military to civilian leadership, with a focused mission of training Iraqi forces, counter-terrorism operations, and protecting U.S.civilian and diplomatic personnel.

VOA: standard.2010.08.02

So iron left to own devices in the atmosphere in the presence of a little bit of water, with the water form iron oxide.

铁在大气中，在存在,少量水的条件下，大气会开始与水结合产生氧化铁。

麻省理工公开课 - 热力学与动力学课程节选

The book of Exodus closes, with the construction of the sanctuary, and when the sanctuary is completed, the text says the presence of the Lord filled the tabernacle.

出埃及记》以建立了避难所作为结束，当这个避难所建成以后,文中说，上帝住进了棚舍。

耶鲁公开课 - 旧约导论课程节选

"When you read a book, you are in direct contact with the mind of another human being, without the distraction of their physical presence, of their image,of their tics .

VOA: standard.2010.02.09

It's with this image of a brooding impregnation that Milton announces the presence in his poem of his most potent, what I think is the most interesting, theological innovation that he comes up with here.

正是通过这个孵伏怀孕的形象,弥尔顿在这里宣告了他在这首诗中,最具潜力，最有趣的神学新观点。

耶鲁公开课 - 弥尔顿课程节选

She conveys her love through her bodily presence just by touching and growing up physically and cut tie of relationship with the baby.

它只通过身体来传递它的爱,只是抚摸宝宝，让它长大,等它长大后和自己断绝关系。

麻省理工公开课 - 电影哲学课程节选

If a ligand comes and interacts with a receptor, it opens up; In the presence of this ligand, if the ligand goes away, it closes.

如果配体与受体相互作用,在配体存在的情况下通道打开,如果配体脱离,通道就关闭

耶鲁公开课 - 生物医学工程探索课程节选