it is saving time 和 it is time-saving 的区别?

it is saving time 和 it is time-saving 的区别? 英语翻译For constomers,it is time- and energy-saving to purchase time saving 的中文意思 water saving 和saving water 的区别 it is a long time和it is long time 的区别 it is time for,和it is time of的区别 it is time to 和it is time for 的区别 what time is it 与when is it 的区别 it is time for和it is time to有神马区别? It is time to do something.和It is time for something.有什么区别 what time is it 和what time is it有什么区别 It is time for something.和It is time to do something.有什么区别?