A: I don't know how to use this camera. 我不知道怎么操作这架相机。

B: Just push. 只要按下去就可以了。

A: It doesn't work. Is there something wrong with it? 它没反应啊，是不是出什么毛病了？

B: Let me see. Oh, you pushed the wrong button. 让我看看。哦，你按错按钮了。

Excuse me, push the shutter, please. 打扰一下，请按快门。

A: Excuse me, push the shutter, please. 打扰一下，请按快门。

B: OK! 好的。