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。

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。