To expend something is to use it up — energy, time, effort, money, resources — usually a large amount, and usually for a purpose. It is a formal verb, and it is the word English reaches for when the thing being used up is not just money: 'she expended a great deal of energy on a problem nobody cared about', 'the army had expended most of its ammunition'.

To expend something expend某個東西 is to use it up就是把它用光 — energy, time, effort, money, resources —──精力、時間、心力、金錢、資源等等── usually a large amount,通常是很大的量 and usually for a purpose.而且通常是為了某個目的。 It is a formal verb,這是一個正式的動詞 and it is the word English reaches for是英文在講以下情況時會用的字 when the thing being used up is not just money:當被用掉的東西不只是錢的時候： 'she expended a great deal of energy on a problem nobody cared about','she expended a great deal of energy on a problem nobody cared about'（她把大把精力花在一個沒人在乎的問題上）， 'the army had expended most of its ammunition'.'the army had expended most of its ammunition'（軍隊已經用掉了大部分的彈藥）。

Two things are worth noticing. First, 'expend' quietly says the thing is gone; that is why 'expendable' means something (or, chillingly, someone) that can be used up and thrown away without much loss. Second, when the object is plain money, everyday English prefers 'spend' — 'expend' there sounds like an accountant is in the room.

Two things are worth noticing.有兩件事值得注意。 First,第一 'expend' quietly says the thing is gone;'expend'悄悄帶有「東西沒了」的意思； that is why 'expendable' means something這也是為什麼'expendable'的意思是某樣東西 (or, chillingly, someone)（或者，說來有點令人發毛，某個人） that can be used up and thrown away without much loss.是可以被用掉、丟棄，也不會有太大損失的。 Second,第二 when the object is plain money,當講的東西就是普通的錢時 everyday English prefers 'spend'日常英文比較愛用'spend' — 'expend' there sounds like an accountant is in the room.──這時候用'expend'聽起來就像會計師在場一樣。

In fact 'spend' and 'expend' are the same Latin word arriving in English by two different roads, which is why they feel like twins with different jobs. The noun is 'expenditure', and 'expenses' — the money you spend for work — belongs to the same family.

In fact其實 'spend' and 'expend' are the same Latin word'spend'和'expend'是同一個拉丁字 arriving in English by two different roads,只是走了兩條不同的路進到英文裡 which is why they feel like twins with different jobs.這就是為什麼它們感覺像是分工不同的雙胞胎。 The noun is 'expenditure',名詞是'expenditure'， and 'expenses'而'expenses' — the money you spend for work —──你為了工作花的錢── belongs to the same family.也是同一個字族的。