She spent hours practising the breast stroke.

她花了几个小时练习蛙泳。

My son can do breast stroke now.

我儿子现在会蛙泳了。

Could you teach me the breast stroke?

你可以教我蛙泳吗？

Im good at freestyle and breast stroke.

我擅长自在泳和蛙泳。

Note the grace and ease of the breast stroke.

还有优美和安逸的蛙泳。