じゅう盲検 もうけん ほうではありませんでした
nijūmōkenhōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 二重盲検法

1. Was not a double-blind method.; Was not a double-blind study.

Past/Perfective
Negative
Polite
Formal Register