名词
中文翻译：信封
同义词：
['envelope', 'packet', 'parcel例句：1. He carefully placed the letter inside the pile of envelopes on his desk.（他小心翼翼地把信放进办公桌上一堆信封里。）2. The postman delivered a large pile of envelopes to her house.（邮递员给她家送来了一大堆信封。）']
例句：
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1. He carefully placed the letter inside the pile of envelopes on his desk.
他小心翼翼地把信放进办公桌上一堆信封里。
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2. The postman delivered a large pile of envelopes to her house.
邮递员给她家送来了一大堆信封。
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3.She carefully unwrapped the package and found a pile of envelopes inside.
她小心翼翼地拆开包裹，里面是一大堆信封。