单词	字段单元
释义	字段单元field unit
随便看	ionium dating method ionium {io ionium {io， 99} ionium-protactinium ratio dating method ionium-radium geochronology ioniums ionium-thorium dating method ionium-thorium method of dating ionium｛=io｝ ionizability ionizable ion(ization) ionization ionization arc-over ionization bounded ionization box ionization burst ionization--burst ionization by collision ionization by collision (or impact) ionization by electron impact ionization by impact ionization by light ionization cell ionization chamber