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。

《新英汉大辞典》

After a handful of mildly successful films in the '70s, Roberts was in a horrible crash in 1981 which put him in a coma for 3 days and significantly altered his appearance.

在经历了70年代的几部反响平平的电影后，罗伯茨在1981年遭遇了一次可怕的车祸，使他陷入昏迷3日而且严重破相。

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After a while the rain began to ease and the moon put in a brief appearance from behind the clouds.

过了一会儿，雨开始变小，月亮从云层中短暂地露出脸来。

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Or Jobs could put in a brief appearance.

FORBES: Steve Jobs To Overshadow iPad 2 Introduction

He put in a storming appearance before a parliamentary commission investigating the August war, saying that Mr Saakashvili had planned a military operation against Abkhazia earlier this year and had ignored promising overtures from his Russian counterpart, Dmitry Medvedev.

ECONOMIST: Georgia after the war

But Parfitt and Rossi put the setback behind them, making a cameo appearance in Coronation Street and releasing their 33rd album, The Party Ain't Over Yet - 40 Years of Status Quo.

BBC: NEWS | Entertainment | The enduring appeal of Status Quo