not made ready for use or action, in particular 未做好使用准备的,尤指 ■(of wood, canvas, or metal) not covered with primer or undercoat (木料,画布,金属)未涂底漆的;无底色的 ■(Biology & Medicine)(of a cell) not having an induced susceptibility or proclivity (生,医)(细胞)未接触抗原的;未经抗原激活的