汤姆经常把他的业余时间用来弹钢琴。

Tom often spends his spare time (in) playing the piano.

youdao

本书的目标就是加快学习过程，力求达到把时间分配为10%用来练习，90%用于通过弹钢琴创造钢琴音乐。

The goal here is to make the learning process so fast that we aim to allocate 10% of practice time to technical work and 90% to making music.

youdao

本书的目标就是加快学习过程，力求达到把时间分配为10%用来练习，90%用于通过弹钢琴创造钢琴音乐。

The goal here is to make the learning process so fast that we aim to allocate 10% of practice time to technical work and 90% to making music.

youdao