And it's this universal concept that is totally subjective.

而这个普遍的概念 其实是非常主观的。

Because time can pass differently for people depending on their frame of reference, there's also no universal concept of simultaneity.

因为人们的时间可以根据他们的参考框架而以不同的方式流逝，所以也没有普遍的同步概念。

Whether it's investing resources into a new business venture or sacrificing leisure time to achieve a personal goal, the principle of strategic sacrifice is a universal concept.

无论是将资源投入新的企业，还是牺牲闲暇时间来实现个人目标，战略牺牲原则都是一个普遍的概念。