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