A systematic histopathologic study of red skin disease of swine was made on 5 naturally infected pigs, 2 experimentally infected pigs and 7 new-born piglets inoculated with tissue culture virus.

对5例自然发病猪，2例人工感染猪以及7例用组织培养病毒回归的乳猪进行了系统病理组织学检查。

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ABSTRACT: Ice wine is super sweet dessert wine made from the intense liquid of naturally frozen grapes. Have you ever heard about the following 7 things about it?

摘要：冰酒，顾名思义，是用天然冰葡萄酿制出的甜葡萄酒。关于冰酒的这七件事，你听说过吗？

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Naturally exposed pigs shed virus as early as 3 days and as long as 7 days after contact with experimentally infected pigs.

自然暴露的猪在与实验用感染的猪接触后最早3天，最迟7天可以检出病毒。

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Naturally occurring stuff is 0.7% one type, 99.3% the other.

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At 38 weeks, the proportion was 5.1% of elective Caesarean babies compared with 1.7% of those born naturally or by emergency Caesarean, and at 39 weeks, 2.1% compared with 1.1%.

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These two processes have occurred naturally since the beginning of time -- 13.7 billion years.

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