long hours和long time有什么区别?

long hours和long time有什么区别? so long 和for a long time 有什么区别 long time和a long time区别? long before和long long ago有什么区别 how long和how much time 有什么区别? How long和 how much time 有什么区别 long long time ago 和 long long ago 有什么不同? long和time的区别 work long time 就是 work long hours not long before 和 before long有什么区别呢? long-term liability和long-term debt 有什么区别 long to 和long for有什么区别