1) To be ground or reduced to powder or dust.
被磨或压成粉或末
2) The chalk was reduced to powder.
粉笔被碾成粉末
3) To be worn or eaten away;become corroded.
被啮蚀或磨损;使被腐蚀
4) To become worn away or tattered along the edges.
被磨损或磨破边缘
5) To become pulverized;turn into powder.
被研碎;变成粉末
6) V or Cr-doped TiO_2 powders
V或Cr掺杂TiO_2粉末
补充资料：粉笔
在黑板上写字用的条状物，用白垩、熟石膏粉等加水搅拌，灌入模型后凝固制成。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条