There's nothing to it. 很简单
A: Are pancakes hard to make?
B: Oh no, there's nothing to it.
There's nothing in sth. ...不属实
I heard a rumor that she's leaving, but there's nothing in it.
There's something to be said for…
There's something to be said for living alone.
I couldn't come to the door - I had nothing on!
Nothing on 没有安排的，有空的
There's nothing on next Friday - we could have the meeting then.