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单词	non-invasive
释义	non-invasive /nɒnɪnˈveɪsɪv / adjective 1(Of medical procedures) not involving the introduction of instruments into the body: non-invasive techniques such as ultrasound... MRI angiography is a unique non-invasive method of imaging blood vessels without using contrast medium. Those non-invasive procedures are the newest and most popular weapon in the arsenal against aging. Collection of urine being a non-invasive procedure it is an ideal specimen especially in children with congenital infections. 2Not tending to spread undesirably or harmfully: non-invasive precancerous tissue... Elementary school-aged children are at highest risk for noninvasive disease.
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