from activity to activaty 中为什么不加定冠词?

from activity to activity.的意思 act,active,activity, should paren push their children from activity to activity是什么意思 they take their children from activity to activity 为什么这个句子中activity 用单数 from activaty to activity中的 activity前为什么不加定冠词? from activity to activaty 中为什么不加定冠词? Good communicating is importantcommunicatingNoun1.the activity of communicating; the activity of conveying information; they could not act without official communication from Moscow(synonym) communication (hypernym) act ,human action ,human activit 请问act ,action ,activity的区别 act action active activity 有什么分别? 英语翻译they take their children from activity to activity,and try to fit as much as possible into their kids` lives they take their children from activity to activity ,and try to fit as much as possible into their接上 kids lives. 翻译players in every event,from spelling bees to golf,act in this way. act to do Many Americans worry about leisure and hurry from one activity to the next,leaving little time to stop and think. from activity to activity八下英语课本（go for it）Unit2 的Reading部分的句子.请问为什么可以这样写.即为什么没有冠词而activity用单数形式？ they take their children from activity to activity ,中的语法知识点they take their children from activity to activity ,annd try to fit as much as possible into their kids' lives ,doctor say many children are under too much pressure中的语法 Their parents take them form activity to activity on weekends he ability to have thoughts and not act on them.It's what seperates man from beast.