It's just that …问题是…
Example 1 场景1
A: Can you help me check the stock tonight. It won't take long. Is that OK?
B: Well, it's just that you always ask me. Could you ask someone else this time?
Example 2 场景2
A: Don't you want to come to the party with me?
B: It's just that my ex-girlfriend is going to be there, and I don't want to see her.
It's just one of those things.
My mom broke her ankle a month before my wedding. It was really unfortunate, but it's just one of those things.
It's just as well that something happened.
It's just as well we brought our raincoats, because it looks like it's about to rain.
Just like that
She announced that she was leaving her job at the end of this week, just like that.