備用的英文：
reserve
spare
alternate
backup

參考例句：
  • A further concrete pump of the same type is available on a standby Basis.
    還有一臺同樣類型的混凝土泵作為備用。
  • Improvised a dinner for the unexpected guests;improvise a makeshift tourniquet.
    為不速之客準(zhǔn)備晚餐;提供備用的止血帶
  • We take thermos of hot coffee to drink when we go cross - country skiing.
    我們?nèi)ピ揭盎r帶了幾保溫瓶備用的熱咖啡。
  • The 41-meter wide deck carries six traffic lanes and two emergency standby lanes, as well as cycle tracks and footpaths.
    這座橋橋面寬41米,有6個車道和兩個應(yīng)急備用車道,還有自行車道和人行道。
  • emergency panel
    備用配電盤
  • invoke emergency powers.
    求助緊急備用部隊。
  • To nourish talents for future use
    儲林備用
  • Spare tyre extra wheel for a car,etc
    (汽車等的)備用車輪.
  • This is called reserve capacity.
    這就稱為備用容量。
  • Ship biscuit( used formerly as food during long voyages )
    硬餅干(舊時遠航備用的)
reserve是什么意思：
v. 儲備，保留；預(yù)訂；推遲
n. 儲備（物）；儲藏量；儲備金；自然保護區(qū)；替補隊員；內(nèi)斂；后備軍
adj. 保留的；預(yù)備的
  • reserve decision
    推遲判決
  • For example,hotel reservation,ticket reservation,restaurant reservation and so on.
    比如說，旅館預(yù)訂，票子預(yù)訂，餐廳預(yù)訂等。
  • They have reserved a box for us in the theatre.
    他們在劇院為我們預(yù)訂了一個包廂。
spare是什么意思：
adj. 備用的；預(yù)備的；剩下的；空閑的；瘦削的；簡單的；不加修飾的
v. 剩余，剩下；抽出，撥出；使免遭傷害；使幸免；不讓…難堪
n. 備用零件，備用輪胎
  • a reserve supply of food; a spare tire; spare parts.
    食物供給儲備；備用輪胎；機器備件。
  • Spare the rod and spoil the child.
    省了棍子，害了孩子。
  • Spare the rod and spoil the child.
    棍棒之下出孝子。
alternate是什么意思：
adj. 輪流的，交替的，間隔的
n. 候補者；替換物
v. （使）交替，輪流
  • Are there alternatives to prison?
    除了監(jiān)禁還有其他辦法嗎？
  • should alternately present as undulate .
    激情平淡應(yīng)呈波浪形交替出現(xiàn)。
  • There are two reasonable alternatives.
    有兩個合理的替代方案。

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