I also issued them a passport, put their picture in it, had them sign their names, check to see how they know their addresses.

我还给他们每人发了一个护照，把他们的照片放在里面，并让他们签名，从而检查他们。

麻省理工公开课 - 媒体、教育、市场课程节选

And of course, there is the picture, but I use my passport for something else.

当然，还有照片，我的护照用在别处了。

麻省理工公开课 - 媒体、教育、市场课程节选