英语词汇“保健粉筆”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	保健粉筆
释义	保健粉筆 bǎo jiàn fěn bǐ大陆地区指以水溶性的磷和钙为主要成分的粉笔，所生粉尘对人体无害。
随便看	routine port call routine power routine power flow routine practice routine precedence routine press briefing routine priority routine procedure routine process routine program Routine propagation routine public traffic routine purchase routine pursuits routiner routine rainfall routine record routine reference routine rehabilitation routine remedy routine repair routine repair cost routine repetition routine replacement routine report