reserve

🇬🇧/rɪˈzɜːv/ 🇺🇸/rɪˈzɜːrv/📚 5610 91 4四级六级考研托福雅思高考
If something is reserved for a particular person or purpose, it is kept specially for that person or purpose. 预留

verb [vt. 及物动词]预订;保留,预留;拥有,保留(某种权利);留作,用于(特定场合);保留(意见),推迟作出(决定或判断);贮存,贮藏;(教会用语)弥撒仪式后保留部分圣餐

If you reserve something such as a table, ticket, or magazine, you arrange for it to be kept specially for you, rather than sold or given to someone else.
预订

noun [抽象名词]储备(量),储藏(量);含蓄,寡言;保留意见,异议;(野生生物)保护区;替补队员,后备队员;后备队,替补队(the reserves);预备役部队,后备部队;(尤指拍卖时的)底价,最低价;(美洲土著居民的)居留地;(陶瓷装饰或纺织品印染中保留原色的)防染本色区 ;(陶瓷装饰或纺织品印染中保留原色的)防染本色区

A reserve is a supply of something that is available for use when it is needed.
储备

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