"at one time" 的音標是：英 [? tu w?n ta?m] ；美 [?t w?n ta?m]。意思是“曾經”和“同時”。

“at one time”在中文中有“曾經”和“同時”兩個意思。

“曾經”：表示某事或某物過去的某個時間點或時間段的存在或存在過，強調的是過去。例如：“我曾經去過那里。”

“同時”：表示兩個或多個事件在同一時間點發生，強調的是并列或同時性。例如：“他在看書，我在寫報告，我們倆在同一段時間里都在忙。”

在具體的語境中，“at one time”可以有多種常見用法：

1. “At one time he was a student, but now he"s a teacher.”（他曾經是一名學生，但現在是一名教師。）

2. “We used to live in the city, but at one time we had a country house.”（我們過去住在城市，但曾有一座鄉村別墅。）

3. “At one time, we were both planning to go, but we ended up not being able to make it.”（我們倆一度都打算去，但最后沒能成行。）

以上就是“at one time”的意思和常見用法，希望對你有所幫助。

以下是使用“at one time”作為“曾經”和“同時”的意思的一些常見短語：

1. Used to：表示過去常常做某事，但現在不再做。

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

2. At one point：表示在某個時間點或階段。

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

3. At the same time：表示同時發生或存在的情況。

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

4. Once upon a time：在童話故事中常用，表示從前。

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

5. Once in a while：表示偶爾或間或的意思。

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

6. Once upon a time in the future：表示對未來的某種想象或計劃。

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

7. In the past：表示在過去的時間里。

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

8. At some point：表示在某個時間點或階段，強調某個特定時刻。

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

9. At one"s peak：表示在某人的最佳狀態或高峰期。

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：表示在某人的最佳狀態，通常用來贊揚某人的優秀表現。

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