untrained /ˌʌnˈtreɪnd/ adjective Learner's definition of UNTRAINED
[more untrained; most untrained]
: without formal training未经正规培训的；未经训练的 -
untrained employees未经培训的员工
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an untrained singing voice未经训练的歌喉
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To the untrained eye, it looks like the magician really is sawing the woman in half.外行人看来，魔术师好像真的在把这名女子锯成两半。
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His untrained ear could not pick out the wrong notes.由于没经过练耳，他分辨不出错误的音符。