For a whole week he hasn't put in an appearance, so we are wondering what happened to him.

他有整整一周没露面了，所以我们都在想他出了什么事了。

I hear even Robert Redford is going to put in an appearance.

听说甚至劳伯·瑞福也将参加。

Since my teacher invited me, I feel I must put in an appearance.

因为老师邀请我，我觉得必须参加。

It was very polite and considerate of them to put in an appearance.

他们非常客气和细心的来参加。

If you don't put in an appearance, everyone will think you have left.

你不来打照面儿，大家会以为你已经走了。