“coal ball”的概念、定义、翻译、参考文献-科学参考

单词	coal ball
释义	coal ball [`kōl ´bȯl] ^GEOLOGY A subspherical mass containing mineral matter embedded with plant material, found in coal seams and overlying beds of the late Paleozoic.
随便看	radiotherapy radiothorium radio time signal radio tower radiotracer radio tracking radio transmission radio transmitter radio transponder radio tube radio watch radio wave radio wavefront distortion radio-wave propagation radio window radish radist radium radium age radium bromide radium carbonate radium cell radium chloride radium F radium needle

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