That's entropy and the arrow of time.

这就是熵和时间之箭。

youdao

Carroll: The arrow of time doesn't move forward forever.

卡罗尔：时间之箭不会永远前进。

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Because we depend on the arrow of time just for our existence.

因为我们依赖时间之箭正是为了我们的存在。

youdao

p2 p1 is greater than p2. Then I want to reverse direction of time. I want the arrow of time to go so that the gas goes from p2 to p1.

一直推，一直推，p1大于,接下来我想让时间倒流,让气体从p2到p1。p2比p1小。

麻省理工公开课 - 热力学与动力学课程节选

The "arrow of time" is based on the notion that it is possible to use data from modern languages to trace their origins back 10, 000 years or even further.

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This serves as a crude model of entropy, Smolyaninov says, representing the thermodynamic arrow of time.

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Alas, the one-way arrow of political time guarantees that the tendency is for the state to expand its sphere and close off and criminalize avenues of escape rather than facilitating and nurturing them.

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