他对他兄弟的意图心中无数。

He was uncertain about his brother's intentions.

《柯林斯英汉双解大词典》

下一步怎么样，我心中无数。

I'm not sure what will happen next.

《新英汉大辞典》

我对他应付此事的能力还心中无数。

I'm not sure of his ability to cope with this.

youdao

我对他们维持治安的能力还是心中无数。

I still had trepidations about their ability to maintain security.

youdao

我对他们维持治安的能力还是心中无数。

I still had trepidations about their ability to maintain security.

youdao