practice,exercise,drill,train都作练习的意思时有何差别?

exercise,practice,practise之间有什么区别? 如何区分exercise,exercises,practice,activities,activity? Practice和exercise有什么区别 单词分辨：practice和exercise的异同 practice和exercise的区别和用法 exercise和practice的区别exercise为名词时与practice为名词时的区别 exercise,practice和practise三者的区别 Theory comes from practice为什么不能用exercise exercise与practice的区别在哪里?用法的区别? exercise ,training 和practice有什么 区别?I've got to go to baseball practice dr Dr dr 求practise和practice用法区别 practice做名词时可不可数?要不要分情况?同样,exercise呢. practice practice Please(t )out your exercise-books and do some written practice.怎么填 practice,exercise,drill,train都作练习的意思时有何差别?