释义 先存 实用短语preexisting nevi先前存在痣preexisting disease原有疾病,预先存在的疾病preexisting mental constructs先存的心智构念preexisting anxiety原先即存在焦虑preexisting mountain belts先在山带preexisting antibody预存抗体editing preexisting rules编辑已经存在的规则among preexisting strains中既有菌株