资料来源 : pyDict

下降,减退;分开,排出

资料来源 : WordNet®

falloff
     n : a noticeable deterioration in performance or quality; "the
         team went into a slump"; "a gradual slack in output"; "a
         drop-off in attendance"; "a falloff in quality" [syn: {slump},
          {slack}, {drop-off}, {falling off}]