untrained
[ˌʌnˈtreɪnd]
adj.
未受训练的，未经培养的;
（动物）未驯服的;
例句:
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Our Intelligence Service was untrained, cumbersome, and almost wholly ineffectual.
我们的情报部门人员缺乏训练，机构臃肿，简直毫无用处。
来自柯林斯例句
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An untrained horse had taken fright at the sound of gunfire.
一匹未经训练的马听到枪响受了惊。
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To the untrained eye, the children were behaving ordinarily.
在外行人眼里，这些孩子表现正常。
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For the untrained these will be hard to follow.
来自SA
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To my untrained ear her experiments are entirely successful.
来自BBC
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Even to the untrained eye, the differences were striking.
来自NEWYORKER