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1·She has been beaten only once in six starts.

她参加了六次比赛，只败过一次。《牛津词典》

2·Ann wore it only once.

安只穿过它一次。

3·The operation should be done only once for each mode.

此操作对于每个模式来说只进行一次。

4·Both the passage and the questions will be spoken only once.

短文和问题仅读一遍。

5·Both the passages and the questions will be spoken only once.

短文和问题只念一次。

6·This is why many viruses, such as measles, make us ill only once.

这就是为什么许多病毒，如麻疹，只会使我们生病一次。

7·Both the conversation and the questions will be spoken only once.

对话和问题仅播放一遍。

8·Both the conversations and the questions will be spoken only once.

对话和问题仅读一遍。

9·Both of these scenarios imply that specialization to each niche occurred only once.

这两套不同的理论都意味着，适应不同的栖息地生活环境的这一过程只发生了一次。

10·An episode of major depression may occur only once in a person's lifetime, but more often, it recurs throughout a person's life.

重度抑郁发作可能在一个人的一生中仅出现一次，但更经常的是，它在一个人的一生中反复出现。