減少的,還原的還原劑
Reductive \Re*duc"tive\ (-t?v), a. [Cf. F. r['e]ductif.] Tending to reduce; having the power or effect of reducing. -- n. A reductive agent. --Sir M. Hale.
reductive adj : characterized by or causing diminution or curtailment; "their views of life were reductive and depreciabory" - R.H.Rovere