So what do you think we're trying to spot the difference on?

那你觉得我们要找出什么区别？

Since we are so used to see these garments moving about in real life, if someone writes a simulator that is off just by a tiny bit, we'll immediately spot the difference.

由于生活中我们习惯于看到这些布料的摆动，所以即使编写的模拟器有一点点偏差，我们也会立刻发现它的不同。