名词
中文翻译：邮政信箱承载能力
同义词：
['mailbox capacity', 'postal capacity']
例句：
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1.The post office has a large post box for mail delivery.
邮局有一个大的信箱用于邮件投递。
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2.The new post box is designed to accommodate more than 500 letters per day.
新的邮筒设计能每天处理超过500封信件。
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3.The postal authorities are considering increasing the post box capacity to accommodate more people.
邮政当局正在考虑增加邮筒容量以容纳更多人。