It's not like that 人与人交往难免会有些误会，当别人误会你时，想要解释这件事情不是这样的，你就可以说。

【例句】
It's not like that. I don't have control over it.
事情不是这样的，我把握不了。

In the movies guns kill people instantly, but it's not like that in real life.
电影中，枪能使人在瞬间毙命，而实际情况并非如此。