one time
一度, 某时
例句与用法：
My brain can't hold so much information at one time.
我脑子一下子记不住这麽多信息。
He was at one time so devoted to piano playing.
他曾经那么沉迷于弹钢琴。
At one time, she is fine, but at another, she is abnormal.
有时候，她表现得很好，有时候又失常。
It's a physical impossibility to be in two places at one time.
同时在两地是自然规律上不可能的事。
The census is taken one time every four years in our country.
我国每四年一次人口普查。
He has at one time or another argued both for and against most of the changes in the city over the past30 years.
他对这个城市近30年来所发生的大部分变化时而表示认可，时而又反对。
At one time I used to go skiing every winter.
我有一度每到冬季就去滑雪。