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balance in real time and, if it was high enough, debited your account
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* 2. 排序：按位置从离终点近→远排序（降序），保证从最前面的车开始分析；，更多细节参见WPS官方版本下载
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A microfluidics chip enables researchers to manipulate and study individual cells, without the use of agar at all. Credit: Brouzes E. et al. PNAS (2009).