“envelope”的概念、定义、翻译、参考文献-科学参考

单词	envelope
释义	envelope [`en·vǝ´lōp] ^{COMMUNICATIONS} A curve drawn to pass through the peaks of a graph, such as that of a moduated radio-frequency carrier signal. ^CYTOLOGY The sum of all cell-surface elements that are located outside the plasma membrane. ^ENGINEERING The glass or metal housing of an electron tube or the glass housing of an incandescent lamp. ^MATHEMATICS 1. The envelope of a one- parameter family of curves is a curve which has a common tangent with each member of the family. 2. The envelope of a one-parameter family of surfaces is the surface swept out by the characteristic curves of the family. ^VIROLOGY The outer membranous lipoprotein coat of certain viruses. Also known as bulb.
随便看	transceiver data link transcendence base transcendence degree transcendence dimension transcendental curve transcendental element transcendental field extension transcendental functions transcendental number transcendental term transconductance transcontinental ballistic missile transcribe transcriber transcriptase transcription transcription unit transcrystalline transcurrent fault potassium bromide-disk technique potassium cadmium iodide potassium carbonate potassium chlorate potassium chloride potassium chloroaurate

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