This study shows that pulmonary interstitial fibrosis can be caused by contacting to dust and the pathogenesis needs further research.

这项研究表明粉尘接触可引发肺间质纤维化，其发病机制有待进一步研究。

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Conclusion It is concluded that VNS is safe and effective as an adjunctive treatment of intractable epileptic seizures, but still needs further study.

结论迷走神经刺激术治疗顽固性癫痫安全并可有一定效果，但其确切疗效仍有待于进一步研究。

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Besides, the paper. Points out that teaching strategy needs further study.

文章同时指出教学策略还需要今后做更深入的研究。

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But whoever gets Mr Clark's job is all too likely to agree to leave the bill out of next year's crowded parliamentary calendar, on the grounds that the issue needs further study.

ECONOMIST: Freedom of information