We cannot guess his motives.

我们不能猜测他的动机。

youdao

I am going to Gretna Green, and if you cannot guess with who, I shall think you a simpleton, for there is but one man in the world I love, and he is an angel.

我要到格利那草场去。如果你猜不着我是跟谁一起去，那我真要把你看成一个大傻瓜，因为这世界上只有一个男人是我心爱的，他真是一个天使。

youdao

The same is true of the theories of every other man, for a theory is only a guess, and you cannot guess or imagine the truth.

这同样也适用于其他任何人的理论，因为一种理论只能算是一种猜想，并且你不能猜想或想象事实的真相。

youdao

We cannot guess his motives. We just have to deal with the reality: that a North Korea that is proliferating weapons and missiles is a serious threat and danger to the world."

VOA: standard.2009.06.14

Similarly, with little nuclear expertise, most of us cannot guess at how the current situation will be resolved.

FORBES: Pause in a Bull Market?

We must learn to be comfortable in the midst of diversity, to find at least a small part of ourselves in every person we meet and to treat one another as an entirely unique and irreplaceable human being whose talents, opinions, background, education and skill we cannot guess at but must learn anew every time we stick out our hand to introduce ourselves to another.

FORBES: Turning Gender-War-Swords into Ploughshares

Not having first-hand knowledge of the facts, I cannot fairly hazard a guess as to why the respondents in this arbitration paid any settlement to this pubic customer or why the individual stockbroker named in the case simply took the blows and opted for nothing more than expungement.

FORBES: Customer Settled Suitability and Churning Case But Stockbroker Wins Expungement