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Pan American Health and Education Foundation (PAHEF) web site.
泛美卫生和教育基金会网站-英文。
youdao
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The scientists spun liquid PAN into a very dense web of nanoscopic fibers.
科学家以液态的PAN制成非常致密的纳米纤维网。
youdao
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The scientists spun liquid PAN into a very dense web of nanoscopic fibers.
科学家以液态的PAN制成非常致密的纳米纤维网。
youdao