at the moment和in time\at once\just then\just now什么区别

at the moment和in time\at once\just then\just now什么区别
at the moment和in time\at once\just then\just now什么区别

at the moment和in time\at once\just then\just now什么区别
意思分别为,at the moment此刻、现在；in time及时；at once立刻、马上；just then就在那时；just now刚才