If the innards of each pig are Petri dishes, then possible pandemic flu viruses have been stewing on hog farms for decades.
如果每头猪的内脏都是培养皿，那么可能的大流行性流感病毒已经在养猪场熬了几十年了。
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If the innards of each pig are Petri dishes where genes are jumbled and dashed together, then possible pandemic flu viruses have been stewing on hog farms for decades.
Hog farmers also are accustomed to their animals getting the flu — and then getting over it fairly quickly with minimal damage, said Dan Warner of the National Pork Producers Council.