必须在人工浸染的寄主中，再次发现这种有机体。
The organism must be found again in the artificially infected host .
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人们如果食用了被洪水浸染过的食物就会得病。
People can get sick if they eat food touched by floodwaters.
今天，轮到罗马人的血泪浸染大地了！
And this day, it shall be Rome who sheds them!
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