成为网球高手需要大量的练习；不在球场上花大量时间练习就很难改进挥拍的技术动作。
Expertise in tennis requires lots of practice; it's hard to improve your swing without spending a lot of time on the court.
她想成为一个舞者，但当发现要花大量时间来练习后，就对上踢踏舞和芭蕾舞课失去了兴趣。
She wanted to be a dancer but became apathetic towards tap and ballet classes when she discovered it took a lot of practice.
学英语是要花费时间的，因此我们要花大量的时间每天练习使用英语。
Learning English takes time so if we want to learn it well, we should spend much time practicing using English every day.
她想成为一个舞者，但当发现要花大量时间来练习后，就对上踢踏舞和芭蕾舞课失去了兴趣。
She wanted to be a dancer but became 3 apathetic towards 4 tap and ballet classes when she discovered it took a lot of practice.
她想成为一个舞者，但当发现要花大量时间来练习后，就对上踢踏舞和芭蕾舞课失去了兴趣。
She wanted to be a dancer but became 3 apathetic towards 4 tap and ballet classes when she discovered it took a lot of practice.
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