他断定这个问题很复杂。
tā duàndìng zhègè wèntí hěn fùzá 。
He concludes that this problem is very complex.
在研究结果出来之前,我们不能断定。
zài yánjiū jiéguǒ chūlái zhīqián , wǒmen bùnéng duàndìng 。
We cannot conclude until the research results are out.
她断定他是诚实的。
tā duàndìng tāshì chéngshí de 。
She determines that he is honest.