单词	bone black
释义	bone black noun : the black residue chiefly of tribasic calcium phosphate and carbon from bones calcined in closed vessels used especially as a pigment or as a decolorizing adsorbent in sugar manufacturing called also bone char Word History First Known Use circa 1735, in the meaning defined above
随便看	positivistically positivists positivities positivity positon positor positrino positron positron-emission tomography positronium positroniums positrons posits positum positure posn posnania Posnanian posnets posol posole posoles posologic posological posologies

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