“expansion”的概念、定义、翻译、参考文献-科学参考

单词	expansion
释义	expansion [ik`span·shǝn] ^ELECTRONICS A process in which the effective gain of an amplifier is varied as a function of signal magnitude, the effective gain being greater for large signals than for small signals; the result is greater volume range in an audio amplifier and greater contrast range in facsimile. ^MATHEMATICS The expression of a quantity as the sum of a finite or infinite series of terms, as a finite or infinite product of factors, or, in general, in any extended form. ^{MECHANICAL ENGINEERING} Increase in volume of working material with accompanying drop in pressure of a gaseous or vapor fluid, as in an internal combustion engine or steam engine cylinder. ^PHYSICS Process in which the volume of a constant mass of a substance increases.
随便看	cold cathode cold-cathode counter tube cold-cathode discharge cold-cathode ionization gage cold-cathode rectifier cold-cathode tube cold-chamber die casting cold chisel cold color cold-conductor effect cold-core cyclone cold-core high cold-core low cold cure cold cutter cold dark matter cold desert cold differential test pressure cold dome cold drawing cold drop cold emission cold extrusion cold-finished steel cold flow

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