I like swimming, and one day, I hope I can be a good swimmer.

我喜欢游泳，我希望有一天自己能成为一名优秀的游泳者。

youdao

I used to be a good swimmer.

我过去是个游泳好手。

youdao

But, to be a good swimmer you've got to practice again and again. To be a great swimmer you have to practice for years until you can harmonize every part of your body and mind.

但是，要想游得好，你必须不断地训练，如果要成为出色的游泳能手，你必须练上好几年，直到你大脑和身体的各部分变得非常和谐。

youdao