untrained
adjective uk/ʌnˈtreɪnd/ us/ʌnˈtreɪnd/
未经训练的;未受培训的
never having been taught the skills for a particular job
untrained staff 未经培训的员工
Compare: uneducateduntutored
Opposite: trained
to the untrained eye 在外行看来
to someone without the skill or knowledge to judge what they see
To the untrained eye, most fake diamonds look real. 在外行眼里，大多数假钻石看上去和真的一样。