“synthetic gem”的概念、定义、翻译、参考文献-科学参考

单词	synthetic gem
释义	synthetic gem [sin`thed·ik `jem] ^MATERIALS A precious or semiprecious stone made by artificial processes, for example, synthetic diamonds made by extreme heat and pressure on carbon, used industrially; and synthetic rubies made by high-temperature crystallization of aluminum oxide, used in laser equipment.
随便看	fractional factorial experiment fractional gas-flow curve fractional horsepower motor fractional ideal fractional precipitation fractional quantum Hall effect fractional replicate fractional sampling fractional sine wave fractionating column fractionation fractionator fraction defective fraction in lowest terms fractoconformity fractography fracton fracton dimension fracture fracture cleavage fractured formation fracture dome fracture-plane inclination fracture pressure fracture strength

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