The coal power sample which has the advantages of good separating effect, high sampling precision and safe use is more suitable for the requirement of practical application.

该煤粉取样器分离效果好，取样精度高，使用安全可靠，更适合实际应用的需要。

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This comes after weeks of spotty polling, in which wide-scale power outages and destruction made it difficult to find a truly random opinion sample.

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From 30 precious milligrams drilled out of the sample they extracted mitochondrial DNA. The mitochondria, a cell's power packs, are the much-modified descendants of bacteria that took up residence in the ancestors of modern animal and plant cells a billion years ago.

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