cost in money, time or effort
money spent in doing sth
"at the expense of"
"he kept a careful record of his expenses at the meeting"
"For tax purposes you can write off the laser printer"
This exuberance of money displayed itself in wantonness of expence.
出自： S. Johnson
The protein issue..was now insufficient for full normal expense of energy.
出自： U. Le Guin