exercise什么意思,exercises

exercise作为 名词时,有两种意思. 作 "练习","操"讲时为可数名词.
八年级英语上册 unit 2 how often do you exercise?
exercise是什么意思(breakfast是什么意思)
2. 当它表示不可数名词时.此时 exercise的意思是"体格锻炼"的总称.
language focus read and complete: exercise exercise