选择性清除是指由于受选择的连锁效应和突变的自然选择，一个突变位点相邻DNA上的核苷酸之间的差异下降或消除。
纳米电子蚀刻素描可以通过施加负电压，对画好的线路进行选择性清除。 他们的成果刊登在去年出版的《科学》杂志上。
Not so with the nanoelectric Etch A Sketch, which can selectively erase the conducting lines it creates by applying negative voltage.
方法根据设定标准选择性收治高血压基底节区脑出血病人，采用CT简易定位小骨窗开颅血肿清除术治疗143例。
Methods 143 patients with hypertensive cerebral hemorrhage in basal ganglia were treated by small bone window craniotomy after the foci were simply aligned by CT.
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