妈妈生日那天，我给她买了一条裤子。

On my mother's birthday, I bought a pair of trousers for her.

你认为我们会设法在妈妈生日之前不让她知道这个惊喜聚会吗？

Do you think we'll manage to keep the surprise party secret from Mum until her birthday?

妈妈生日快了！

Mom Happy Birthday!

祝儿子心目中最好的妈妈生日快乐。

Happy birthday to the best mom a son ever had.