At one time, walking across the room took all her strength.

曾经有段时间，穿过这个房间得用尽她全部的力气。

《柯林斯英汉双解大词典》

At one time 400 men, women and children lived in the village.

曾一度有400个男人、女人和儿童住在这个村子。

《柯林斯英汉双解大词典》

We had to go and see the principal one at a time.

我们得逐一去见校长。

《牛津词典》

Naming expert Cleveland Evans explains that many of these names were traditionally female or male at one time or another.

VOA: special.2009.07.06

Let me make sure that the user annotations are disabled this time and let's take a little look at this one here.

我先把用户信息注释去掉,然后开始播放。

哈佛公开课 - 计算机科学课程节选

At any one time, there's about, I think, 50 or 60 different productions in the West End here in London.

任何时候，我想想，大概都有50或者60部不同的成品剧在伦敦西区上演。

廉价看音乐剧的方法 - SpeakingMax英语口语达人

We started small, building our company and our brand one book at a time, one day at a time.

FORBES: Entrepreneurial Life: Tales of a Young Bookseller

You can only drive one car at a time, live in one house at a time, be on one paradise island at a time.

FORBES: What Does It Feel Like To Be A Self-Made Millionaire Under The Age Of 25?

Whether it's just one t-shirt at a time, one light bulb at a time, one relabeled food out at a time, we'll begin to see a real cultural shift on the issue.

NPR: Taking a Practical Approach to 'Green' Living