unproven
/ʌnˈpruːvən/(亦作unproved) /-ˈpruːvd/
adjective
1- not demonstrated by evidence or argument as true or existing未经证明的; 未经证实的：
long-standing but unproven allegations
长期存在但未经证实的说法
the risks are unproven.
风险未经证实。
1.1
- (of a new or alternative product, system, or treatment) not tried and tested（新或替代产品, 系统或疗法）未经实践检验的。