Meaning of gū jì:
gū jì
估计
Verb
to estimate; to assess; to calculate; (coll.) to reckon; to think (that ...)
Wǒmen xūyào xiān duì zhège xiàngmù de chéngběn jìnxíng gūjì.
我们需要先对这个项目的成本进行估计。
We need to first estimate the cost of this project.
Wǒ gūjì tā yǐjīng líkāi le.
我估计他已经离开了。
I reckon he has already left.