envelope background

envelope

/ˈɒn.və.ləʊp/ /ˈɑn.vəˌloʊp/ /ɛnˈvɛləp/

Illustration envelope - Image 1

Illustration envelope - Image 2

noun

信封

A paper or cardboard wrapper used to enclose small, flat items, especially letters, for mailing.

Examples :

"My sister put the letter in an envelope and took it to the mailbox. "

我妹妹把信放进信封里，然后拿到邮箱寄走了。

stationery communication

Illustration envelope - Image 1

Illustration envelope - Image 2

Illustration envelope - Image 3

noun

信封, 封套。

Something that envelops; a wrapping.

Examples :

"The letter was carefully placed inside the envelope. "

信被小心地放进了信封里。

stationery material

Illustration envelope - Image 1

noun

气囊，囊体

A bag containing the lifting gas of a balloon or airship; fabric that encloses the gas-bags of an airship.

Examples :

"The hot air balloonist carefully inspected the envelope for any tears before filling it with hot air. "

热气球飞行员在往气囊里充入热空气之前，仔细检查了囊体，看是否有任何破损。

vehicle part technology nautical

Illustration envelope - Image 1

noun

包络。

A mathematical curve, surface, or higher-dimensional object that is the tangent to a given family of lines, curves, surfaces, or higher-dimensional objects.

Examples :

"The engineer used the envelope of possible flight paths to determine the safest trajectory for the rocket. "

工程师利用可能飞行路径的包络线来确定火箭最安全的轨道。

math science technical

Illustration envelope - Image 1

noun

包络，封包曲线

A curve that bounds another curve or set of curves, as the modulation envelope of an amplitude-modulated carrier wave in electronics.

Examples :

"The technician carefully measured the envelope of the radio signal to ensure proper transmission. "

技术员仔细测量了无线电信号的包络，以确保正确传输。

electronics technology signal physics math

Illustration envelope - Image 1

noun

包络，波封。

The shape of a sound, which may be controlled by a synthesizer or sampler.

Examples :

"The musician carefully shaped the sound of the trumpet using a synthesizer to create a specific envelope. "

这位音乐家使用合成器精心调整了小号的声音，以创造出特定的声音包络 (bāoluò)。

music sound technology electronics signal

Illustration envelope - Image 1

Illustration envelope - Image 2

noun

信封，封套。

The information used for routing a message that is transmitted with the message but not part of its contents.

Examples :

"The envelope on the letter contained the address, but not the actual letter itself. "

信封上写着地址，但信封本身并不是信的内容。

technology computing communication internet technical

Illustration envelope - Image 1

Illustration envelope - Image 2

Illustration envelope - Image 3

noun

信封，封套

An enclosing structure or cover, such as a membrane; a space between two membranes

Examples :

"The onion's outer layer is a tough envelope protecting the delicate inner parts. "

洋葱的外层是一层坚韧的保护层，像信封一样包裹着里面娇嫩的部分.

material structure stationery writing

Illustration envelope - Image 1

noun

性能包线，运行范围

The set of limitations within which a technological system can perform safely and effectively.

Examples :

"The new software program has a narrow envelope of acceptable temperatures for optimal performance. "

这个新软件程序的最佳性能运行范围对温度的要求很窄。

technology technical system range

Illustration envelope - Image 1

noun

彗发，彗云。

The nebulous covering of the head or nucleus of a comet; a coma.

Examples :

"The comet's envelope was a bright, fuzzy cloud of gas and dust. "

这颗彗星的彗发是一个明亮、模糊的气体和尘埃云。

astronomy space

Illustration envelope - Image 1

noun

护堤，堤墙

An earthwork in the form of a single parapet or a small rampart, sometimes raised in the ditch and sometimes beyond it.

Examples :

"The soldiers built an envelope around the village to protect it from enemy attack. "

士兵们在村庄周围修筑了一道护堤，用以保护它免受敌人的袭击。

military architecture

Illustration envelope - Image 1

Illustration envelope - Image 2

Illustration envelope - Image 3

verb

包裹，覆盖。

To surround or enclose.

Examples :

"The thick cardboard box enveloped the fragile glassware, protecting it from damage during shipping. "

厚实的纸板箱包裹着易碎的玻璃器皿，保护它在运输过程中免受损坏.

area environment