I'm not in the best position to advise you.

I'm afraid I am not in a position to help you.

我恐怕帮不了你。

The word 'failure' is not in his vocabulary.

在他的词典中没有“失败”这个词。

I'm not in the business of getting other people to do my work for me.

我无意让别人替我工作。

The regions differ in size, but not in kind.

这些地区大小各异，但类型相同。

You're not in a fit state to drive.

你现在的状态不宜开车。

He was not in a good mood that day.

他那天心情不好。

I'm not in the market for a new car at the moment.

我现在还不想买新车。

Do it now please ─ not in three hours' time.

请现在就干，而不是三个小时之后。

For a moment he seemed even to have been deprived of the power of speech.

他有一阵子仿佛连说话的功能也被剥夺了。

The doctor restored her power of speech.

医生使她恢复了说话的能力。

The illness deprived her of the power of speech.

她因病失去了说话能力。

He did not say a word; he was happy beyond the power of speech.

他一句话也没说，他已经乐得说不出话来了。

The shock had robbed her of the power of speech.

那种震惊使她说不出话来。

Only humans have the power of speech.

只有人类才有说话能力。

He has lost the power of speech.

他丧失了言语能力。

He could lose the power of speech.

他可能会失去说话的能力。

He appeared to have lost the power of speech.

他似乎失去了说话的能力。

His illness left him without the power of speech.

他病后丧失了说话能力。

Man is the only animal that has the power of speech.

人是唯一能说话的动物。

They did not have the power of speech.

他们不具有说话的能力。