This means that there can be no important difference between the forward and backward directions of imaginary time.

这意味着虚时间的向前和向后方向之间没有重要区别。

Yet there is a big difference between the forward and backward directions of real time in ordinary life.

然而，在日常生活中，实时的向前和向后方向有很大的不同。

To summarize, the laws of science do not distinguish between the forward and backward directions of time.

总而言之，科学定律不区分时间的向前和向后方向。