断定

wǒ gǎn duàn dìng zhè shì shì tā gàn de

我敢断定这事是他干的。

I am certain that this was his work.

jié guǒ rú hé hái nán yǐ duàn dìng

结果如何，还难以断定。

It's tricky to decide what the outcome will be.

jīng guò zǐ xì yán jiū tā duàn dìng zhè yàng zuò shì bù xíng de

经过仔细研究，他断定这样做是不行的。

After careful analysis, he concluded that it was not possible to do it this way.

cóng nǐ de huà li kě yǐ duàn dìng nǐ duì cǐ shì shì bù tóng yì de

从你的话里可以断定，你对此事是不同意的。

Your choice of words shows that you don't agree with this.

duàn dìng rén zhì yǐ bèi shā sǐ

断定人质已被杀死

conclude that the hostage has been killed

gēn jù zhèng jù duàn dìng tā yǒu zuì

根据证据断定他有罪

conclude him guilty upon evidence

wǒ wú fǎ duàn dìng tā shì fǒu zài kāi wán xiào

我无法断定他是否在开玩笑。

I couldn't decide whether he was joking or not.

wǒ men duàn dìng nǐ men shì bù gǎn de

我们断定你们是不敢的。

We are sure you dare not.

hěn nán duàn dìng zhì bìng de què qiè yuán yīn

很难断定致病的确切原因。

It is difficult to determine the exact cause of the illness.

wǒ men yě xǔ kě yǐ duàn dìng tā gēn běn jiù méi yǒu shì guo zhè ge jiǎn dān de shí yàn

我们也许可以断定，他根本就没有试过这个简单的实验。

We may conclude that he never had recourse to this simple experiment.