Schrodinger's equation, and so on – don't say anything about the direction of time.

薛定谔方程等等—都没有谈及时间的方向。

This is the direction of time in which the universe is expanding rather than contracting.

这是宇宙膨胀而不是收缩的时间方向。

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。

The direction of time in which a computer remembers the past is the same as that in which disorder increases.

计算机记忆过去的时间方向与无序增加的时间方向相同。

Or in other words, why does disorder increase in the same direction of time as that in which the universe expands?

或者换句话说，为什么无序度会在与宇宙膨胀相同的时间方向上增加？

Systems in our universe move from order to disorder, and it is that property of the universe that defines the direction of time's arrow.

我们宇宙中的系统会从有秩序变得无秩序。正是宇宙的这个属性，定义了时间之箭的方向。

And why is the direction of time in which disorder increases the same as that in which the universe expands?

为什么无序增加的时间方向与宇宙膨胀的时间方向相同？

The laws of physics, therefore, must change if one reverses the direction of time—they do not obey the symmetry T.

因此，如果时间方向颠倒，物理定律就必须改变——它们不服从对称性 T。

But whereas we can move in any direction in those other three dimensions we can only move in one direction of time — forward, relentlessly.

但是，虽然我们可以在其他三个维度上向任何方向移动，可我们只能朝着时间的一个方向移动——义无反顾地向前。

Systems in our universe move from order to disorder, and it is that property of the universe that defines the direction of time’s arrow.

我们宇宙中的系统从有序变为无序，正是宇宙的这一特性定义了时间箭头的方向。

Any intelligent being an observer within the universe must be on one side or other side of the Janus point, so they will think that's their direction of time.

宇宙中任何智慧的观察者都必须在雅努斯点的一边或另一边，所以他们会认为那是他们的时间方向。

The scientific problem for a hundred and seventy years is that the laws of nature do not distinguish a direction of time, at least not the ones that are really relevant.

一百七十年来的科学问题是，自然规律不能区分时间的方向，至少不能区分真正相关的方向。