“古代计时器”的概念、定义、翻译、参考文献-科学参考

单词	古代计时器
释义	古代计时器 Encyclopedia 工学﹝古代计时器和天文器械﹞释 ancient timers古代计时器近代机械钟表诞生前利用特定原理来测量时间的计时装置。
随便看	zero-crossing zero crossing comparison method zero-crossing discriminator zero cross rate zero-cross rate zero curvature zero-curvature equation zero curve zero cycle zero dagger zero-dagger zero-dagger 0+ zero date zero-day attack zero-day vulnerability zero defect zero deflection zero degree zero degree spectrometer zero-density zero-density hypothesis zero-density method zero-density theorem zero-derivative zero-dimensional

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