我不断地练习打网球有数年了，从未为了达到一个真正的高水准每天必须练习几个小时。

I have practiced tennis deliberately over the years, but never for the several hours a day required to achieve a truly high level of excellence.

youdao

我不断地练习打网球有数年了，从未为了达到一个真正的高水准每天必须练习几个小时。

I have practiced tennis deliberately over the years, but never for the several hours a day required to achieve a truly high level of excellence.

youdao