Can you swim? Yes. I'm a good swimmer.

你会游泳吗？会。我游泳游得很好。

youdao

Luckily, I am a good swimmer.

幸好我是个游泳好手。

《牛津词典》

You don't have to worry about me. I'm a good swimmer.

你不必替我担心。我是一个游泳健将。

《柯林斯英汉双解大词典》

She was a good swimmer, better than David.

NEWYORKER: The Swan

Weissmuller, though, was good at wrestling alligators and a marvellous swimmer (a former Olympics champion).

ECONOMIST: Maureen O��Sullivan

After all, for most of them, getting a state title is as good as their career will get, and that chance, certainly for an individual swimmer, is blown away the moment Franklin enters the pool.

FORBES: Olympian Missy Franklin Gives Up Millions To Validate The High School Sports Experience