否定前缀de(非..）declassify,
dis（构成动词）disorder,
il,illegal,
im,impolite,
in,informal
ir,irregular
mal,malnutrition
non,non-smoker
un,unhappy
否定前缀de(非..）declassify,
dis（构成动词）disorder,
il,illegal,
im,impolite,
in,informal
ir,irregular
mal,malnutrition
non,non-smoker
un,unhappy