Polio, although it is eradicated in the United States, it continues elsewhere and is able to be brought into the country by visitors.
Polio, although it is eradicated in the United States, it continues elsewhere and is able to be
Polio, although eradicated in the United States, it still continues elsewhere and can be
Although still continuing elsewhere, polio has been eradicated in the United States and could be
Although having been eradicated in the United States, polio still continues elsewhere and is capable of being
Although eradicated in the United States, polio continues elsewhere and could be
D having been 在说P一只在被消灭,直到现在还是在被消灭着,不对。
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