English [? d？ t m？ θs] Beauty [? d？ t m？ θs]

I'm not good at math, but I have to teach it, so I teach while learning. ?

I am not good at math, but I want to be a math teacher, so I want to buy and sell now.

Phrases:

Be good at; Be good at; Be good at; Be good at sth.

Not good at it is not good at it; serious

Good at rowing. Good at rowing.

Be good at doing sth; Be good at doing sth; Be good at doing sth; be adept in