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cumulative weight += weights[i]
，详情可参考谷歌浏览器【最新下载地址】
这对美国产业的冲击，是颠覆性的。。关于这个话题，旺商聊官方下载提供了深入分析
In general, more testing adds to the costs. And lab-based testing may not be fast or agile enough to support border control officers, fraud investigators or food producers in the field.