中译英:附件是你们在饭店用餐时的照片.

Attached is the picture which was shooted when you are having dinner(或者lunch，看你们当时吃的是晚餐还是午餐了)at the restaurant.

我们客户来信提到附件是都是用Attachded 这个词的。

Here are some photos about you dining in the restaurant in the adjunct.

The annex is dining in a restaurant when your photos

There are some photos that you were dineing in restaurant with this mail.

The picture was taken when you had breakfast/lunch/dinner in the hotel.