什么是 expense?Something spent to attain a goal or accomplish a purpose: an expense of time and energy on the project. A loss for the sake of something gained; a sacrifice: achieved speed at the expense of accuracy. An expenditure of money; a cost: an improvement that was well worth the expense; a trip with all expenses paid. Charges incurred by an employee in the performance of work: was reimbursed for her travel expenses. Informal Money allotted for payment of such charges.Something requiring the expenditure of money: Redecorating the house will be a considerable expense. Archaic The act of expending.To charge with expenses.To write off as an expense.at (one's) expense To one's detriment or chagrin: telling jokes at my expense.