But both of these concepts are paradoxical in nature. Because, in some scenarios, when we expend energy, we actually gain more of it. And when we spend time, we open more up in our lives.

在某些情况下，当我们消耗精力时，我们实际上能从中得到更多的精力，而我们花费时间时，我们会对生活敞开更多时间，这两个概念从本质上来讲是矛盾的。

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But both of these concepts are paradoxical in nature.Because, in some scenarios, when we expend energy, we actually gain more of it.And when we spend time, we open more up in our lives.

在某些情况下，当我们消耗精力时，我们实际上能从中得到更多的精力，而我们花费时间时，我们会对生活敞开更多时间，这两个概念从本质上来讲是矛盾的。

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Why expend time and energy in activities that fail to increase reproductive success?

为什么花时间和精力去做不能提高繁殖率的事情？

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While Americans expend fewer calories at work, they spend more time in cars -- almost twice as much as in the 1970s.

CNN: Why we're getting fatter -- and what to do about it

Pick any aspect of employment-related immigration and one will find regulations that compel companies to expend time and money under the notion that the number of jobs in America is fixed, work can be performed in only one geographic location and nearly all individuals in a given field are the same.

FORBES: Over-Regulated America

As Americans spend more time in cars and behind desks--both of which are long-term trends--they expend fewer calories in their daily lives.

FORBES: Fat And Happy In Oak Brook And Beijing