好兆头的英文：
lucky

You're a lucky dog!
你真是个幸运儿!

You don't say! You are lucky
真的啊!你真幸运

He is really a lucky dog.
他真是个幸运的家伙。

Seven is my lucky number.
七是我的幸运数字.

That is merely a lucky guess.
那只是侥幸猜中。