Experts in photography say it is easy to tell that the photo was not posed.

VOA: special.2010.05.31

And if we have time today, we'll start in on the photo-electron spectroscopy, if not, that's where we'll start when we come back on Wednesday.

而且如果我们今天还有时间，我们将会开始光电子频谱，如果没有,我们将会在下周三回来时开始。

麻省理工公开课 - 化学原理课程节选

And I've seen other similar things where commercial photography, photo journalism and all that stuff is up there,

我也见过很多商业摄影师，记者摄影师，等等，都是

问摄影家 - SpeakingMax英语口语达人

Most photo experts will tell you that the picture Joe Rosenthal made is almost perfect.

VOA: special.2010.05.31

That's me -- this is my college yearbook photo.

这个人是？就是我，这是我的大学年鉴照片。

麻省理工公开课 - 化学原理课程节选