“whetstone”的概念、定义、翻译、参考文献-科学参考

单词	whetstone
释义	whetstone [´wet´stōn] ^MATERIALS Any hard, fine-grained, naturally occurring, usually siliceous rock suitable for sharpening cutting instruments.
随便看	time-invariant system time lag time-lapse photography timelike path timelike surface timelike vector time line time-mark generator time measurement time meridian time modulation time-motion study time-multiplexing time-of-day clock time of delivery time of flight time-of-flight mass spectrometer time-of-flight spectrometer time of origin time of receipt time of set time on target timeout time over target time phase

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