Growth, reproduction, and daily metabolism all require an organism to expend energy.

生长、繁殖和日常的新陈代谢都需要有机体来消耗能量。

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They do not want to expend energy in what, to them, is a lost cause.

他们不想把精力投到他们认为注定不会成功的事中去。

《柯林斯英汉双解大词典》

Analyze risks to decide where to expend test effort.

分析风险，决定测试的重点。

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"The blunt reality is that there will be dwindling appetite and patience in the US Congress -- and in the American body politic writ large -- to expend increasingly precious funds on behalf of nations that are apparently unwilling to devote the necessary resources or make the necessary changes to be serious and capable partners in their own defense."

VOA: special.2011.06.11

It doesn't have to expend as much energy, therefore, the majority in this case is right.

能量输出较少，因此，这一次，多数派是正确的。

麻省理工公开课 - 热力学与动力学课程节选

The reversible process is going to be colder because it has to expend more energy.

可逆过程降温更多,因为输出的能量更多。

麻省理工公开课 - 热力学与动力学课程节选

Think of a salmon struggling upstream just to expend its body (now expendable) in spawning.

WSJ: Matt Ridley on the Ideas in Mark Pagel's Wired for Culture | Mind & Matter

Compared to refining, newspaper publishing offers plenty of opportunities to expend capital but not much opportunity for profits.

FORBES: Koch On Rumors He'll Buy The L.A. Times

The cake needs to be produced, and the baker has to expend labor and material to produce it.

FORBES: The Keynesian Illusion Of Demand Creation