once 的意思

释义：

n. 一次

构词：

one一+ce→once一次→一旦

例句：

Once , in the dim and distant past, I live in here.
我很久以前在这里住过. 换一句

How dare you? Take your hand off me at once.
放肆! 马上把你的手挪开. 换一句

I see him maybe once every three , four months.
我大概每三四个月见他一次. 换一句