原因很简单，棋局的潜在变数相当之大，以至于计算机根本无法将其完全计算出来。

For the simple reason that the number of possible chess games is so huge, that computers can't calculate it.

youdao

虽然我们能够控制的一些变数，可以一直负责该协会的观察，在这里(教育和收入)，其他潜在的第三个变数仍然不受控制。

Though we were able to control some variables that could have been responsible for the associations observed here (education and income), other potential third variables remained uncontrolled.

youdao

虽然我们能够控制的一些变数，可以一直负责该协会的观察，在这里(教育和收入)，其他潜在的第三个变数仍然不受控制。

Though we were able to control some variables that could have been responsible for the associations observed here (education and income), other potential third variables remained uncontrolled.

youdao