英语翻译on their all the time worrying什么意思?听力材料：Look,John,i konw

英语翻译
on their
all the time worrying什么意思?
听力材料：
Look,John,i konw you love the city but,well,we don't often go out and use it,do we?So i was thinking perhaps if we moved to the country.I mean we'd get more money out there.Think of the children.They could actually walk to school,hmm?Not take that horrible underground.I do hate them using the underground.It'd be cheaper,woundn't it?And well,the air is much cleaner and therefore much more relaxing.They could play.We wouldn't have to be on their backs all the time worrying.And think of you,you wouldn't have to drive to work.You could get the trainand do some work on the train so therefore you can play with the children in the evening.Oh ,think about it,please?