envelope
n. 信封, 封套, 封袋 [医] 膜, 包袋
发音
词形变化
别名
教材释义与例句
信封，封皮；包膜；[天] 包层；包迹
a thin paper cover in which you put and send a letter
envelopes and stamps
信封和邮票
She tore open the envelope and frantically read the letter.
她撕开信封慌忙看信。
He got a job stuffing envelopes (= filling them with letters ) at the campaign headquarters.
他找了一份在竞选总部装信封的工作。
释义与例句
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1.
A paper or cardboard wrapper used to enclose small, flat items, especially letters, for mailing.
信封
批囊
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2.
Something that envelops; a wrapping.
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3.
A bag containing the lifting gas of a balloon or airship; fabric that encloses the gas-bags of an airship.
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4.
A mathematical curve, surface, or higher-dimensional object that is the tangent to a given family of lines, curves, surfaces, or higher-dimensional objects.
数学 -
5.
A curve that bounds another curve or set of curves, as the modulation envelope of an amplitude-modulated carrier wave in electronics.
商务 工程 物理 电子 -
6.
The shape of a sound, which may be controlled by a synthesizer or sampler.
音乐 -
7.
The information used for routing a message that is transmitted with the message but not part of its contents.
计算机 工程 数学 -
8.
An enclosing structure or cover, such as a membrane; a space between two membranes
生物 -
9.
The set of limitations within which a technological system can perform safely and effectively.
工程push the envelope
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10.
The nebulous covering of the head or nucleus of a comet; a coma.
天文 -
11.
An earthwork in the form of a single parapet or a small rampart, sometimes raised in the ditch and sometimes beyond it.
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1.
To put (something) in an envelope.
罕用 及物 -
1.
Archaic form of envelop.
古体
词汇关系
相关短语
词源
PIE word *h₁én From French enveloppe. The engineering sense is derived from flight envelope. The verb is from the noun.
来源：wiktionary