double-blind
/ˈdʌblblaɪnd/adjective
attrib.
- denoting a test or trial, especially of a drug, in which any information which may influence the behaviour of the tester or the subject is withheld until after the test（试验或试用）双盲的（指在药物等的测试中, 试验者和受试验者双方对可能影响他们行为的有关情况均无所知）。