Mr. Foker himself is a worthy man, though not of high extraction or indeed much education.

福克先生本人也是值得尊敬的，尽管他出身不太高贵，受的教育确实也有限。

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The developed method was convenient, efficient and easy to operate. It had high extraction rate and low toxicity to the environment.

本实验方法操作方便，提取率较高，对环境和人体毒害低，是一种便捷、高效的提取分离方法。

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ConclusionCompared with steam distillation, the supercritical carbon dioxide extraction showed many advantages, such as short extraction time and high extraction yield.

结论与水蒸汽蒸馏法相比较，超临界萃取法具有萃取率高、耗时少等优点。

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Royalties on production discriminate against ageing mines, with high extraction costs.

ECONOMIST: The political dangers of taxing carbon and mining

Suncor has run into an extra rich piece of ore with a high coal component, he said, which caused problems in the extraction process.

FORBES: Magazine Article

Fracking is a technique of shale gas extraction that involves pumping water and chemicals into shale rock at high pressure to extract gas.

BBC: Lancashire shale gas 'could be worth billions'