a/an [adj] strongbox
strongbox前常用形容词修饰，如steel, heavy, locked。
She keeps her jewelry in a steel strongbox.
她把珠宝放在一个钢制保险箱里。
保险箱；坚固的带锁箱
用于存放钱或贵重物品的坚固箱子；可以上锁
a strong, lockable box used for storing money or valuables
保险箱
A sturdy box with a lock, for storing valuables.
用于存放钱或贵重物品的坚固箱子；可以上锁
a strongly made box for holding money or valuables; can be locked
The hotel manager keeps the guests' passports in a strongbox behind the desk.
酒店经理把客人的护照放在前台后面的保险箱里。
用法提示：strongbox 是名词，指坚固的带锁箱子，用来存放贵重物品。
Before leaving on vacation, she put her jewelry and cash into a strongbox.
去度假前，她把首饰和现金放进了一个保险箱。
用法提示：strongbox 为单数名词，表示存放贵重物品的带锁箱子。
The antique dealer stored old coins in several strongboxes in the basement.
古董商把古币存放在地下室的几个保险箱里。
用法提示：strongboxes 是 strongbox 的复数形式，也是名词，指多个带锁的坚固箱子。
strongbox前常用形容词修饰，如steel, heavy, locked。
She keeps her jewelry in a steel strongbox.
她把珠宝放在一个钢制保险箱里。
表示位置，常作地点状语。
The documents are stored in the strongbox.
文件存放在保险箱里。
强调多个保险箱时用复数形式。
The bank has several strongboxes in the vault.
银行在保险库里有几个保险箱。
grammar · medium
易错句子I keep cash in strongbox.
正确表达I keep cash in a strongbox.
英语中可数名词单数前需要不定冠词，而汉语没有冠词，学习者容易遗漏。应加上'a'表示一个保险箱。
grammar · medium
易错句子We have two strongboxs.
正确表达We have two strongboxes.
英语中以-x结尾的名词变复数时加-es，而不是直接加-s。'strongbox'的复数形式是'strongboxes'。
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