radiation background辐射: radiation; exposure; radio; ...本底: background漫射本底: diffusing background散射本底分析: diffuse background distribution天然放射本底: natural radioactive background下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:辐射本底，即可在微信中查询翻译
