to fail to include someone or something that should be included

You've missed out your address on the form. 你在表格上漏填了你的地址。

Oh, I'm sorry, Tina, I've missed you out. What would you like to drink? 哦，对不起，蒂娜，我把你漏了。你要喝点什么？

to fail to use an opportunity to enjoy or get an advantage from something

Don't miss out on the fantastic bargains in our summer sale. 别错过我们夏季甩卖中极好的便宜货。

We didn't have a TV at home when I was young, and I felt as though I missed out. 年轻时家中没有电视，我觉得好像错过了什么似的。