For example, birds may expend more of their reserves on thermoregulation if they spend the night exposed to the wind on a song post than if they are in a sheltered roost site.

例如，与在有遮挡的栖息地的鸟类相比，如果鸟类在风中露宿一晚，它们可能会更多地利用体温调节。

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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。

youdao

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。

youdao

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

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