The energy that male fish expend on courtship comes at the expense of their semen.
ECONOMIST: Males can take many routes to reproductive success
He leads his Republican rivals in fundraising by tens of millions of dollars, and will not have to expend money on a primary opponent.
BBC: Barack Obama 2012 campaign raises $70m in third quarter
Over the past fortnight or so, Mr Clinton has been faulted for refusing to expend political capital on the case for ground troops.
The reason is that if states unilaterally start arresting undocumented aliens and dispatching them to the federal government for deportation, they will force the federal government to expend law enforcement resources on immigration when it might have other, more pressing, concerns such as, say, terrorism.
The exemption would enable some researchers and plant breeders to expend more of their resources on actual work rather than on jumping through gratuitous regulatory hoops.
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The Romney win likely makes that contest a do-or-die battleground for nearly all the other contenders, most of whom now appear ready to expend most of their campaign funds on TV ads, many of them aimed at attacking Mr. Romney.
And then, like Eleanor and me on our walk, we expend a tremendous amount of energy to keep up a ruse that fools no one.
Firms expend energy, time and talent not on innovating and creating better products, but on securing government help, often to ensure that potential rivals are kept at bay.
For example, they observed that we will expend more effort to save a few dollars on a small purchase than to save the same amount on a large purchase.
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The Gruets expend much effort getting their wines into Santa Fe restaurants, figuring on word-of-mouth tourist advertising.
Sure, people on the right of a certain age may prove more likely to expend emotion in saying farewell to one specific car, but we will never go along with the idea of saying goodbye to the automobile.
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