“at one time” 意思有两个，“曾经”和“同时”：

"at one time" 的音标是：英 [ə tu wʌn taɪm] ；美 [æt wʌn taɪm]。意思是“曾经”和“同时”。

“at one time”在中文中有“曾经”和“同时”两个意思。

“曾经”：表示某事或某物过去的某个时间点或时间段的存在或存在过，强调的是过去。例如：“我曾经去过那里。”

“同时”：表示两个或多个事件在同一时间点发生，强调的是并列或同时性。例如：“他在看书，我在写报告，我们俩在同一段时间里都在忙。”

在具体的语境中，“at one time”可以有多种常见用法：

1. “At one time he was a student, but now he"s a teacher.”（他曾经是一名学生，但现在是一名教师。）

2. “We used to live in the city, but at one time we had a country house.”（我们过去住在城市，但曾有一座乡村别墅。）

3. “At one time, we were both planning to go, but we ended up not being able to make it.”（我们俩一度都打算去，但最后没能成行。）

以上就是“at one time”的意思和常见用法，希望对你有所帮助。

以下是使用“at one time”作为“曾经”和“同时”的意思的一些常见短语：

1. Used to：表示过去常常做某事，但现在不再做。

例如：I used to love this movie, but now I don"t like it at all.

2. At one point：表示在某个时间点或阶段。

例如：At one point, we were both working full-time jobs, but now I"m retired.

3. At the same time：表示同时发生或存在的情况。

例如：I"m studying for my exam and cooking dinner at the same time.

4. Once upon a time：在童话故事中常用，表示从前。

例如：Once upon a time, there was a beautiful princess who lived in a magical land.

5. Once in a while：表示偶尔或间或的意思。

例如：I like to go for a run in the park once in a while.

6. Once upon a time in the future：表示对未来的某种想象或计划。

例如：I dream of living on a tropical island once in the future.

7. In the past：表示在过去的时间里。

例如：In the past, we used to go out for dinner every Friday night.

8. At some point：表示在某个时间点或阶段，强调某个特定时刻。

例如：At some point during the night, I realized I had left my keys at home.

9. At one"s peak：表示在某人的最佳状态或高峰期。

例如：He was at his peak when he was in his 20s, but now he"s settled into a comfortable middle age.

10. At one"s best：表示在某人的最佳状态，通常用来赞扬某人的优秀表现。

例如：She was at her best when she was working with children, teaching them how to read and write.