We are already seeing this problem―adding human growth hormone genes to pigs certainly makes them grow―but it also gives them arthritis and makes them cross-eyed, which was entirely unpredictable．
2
在以后的研究中，静脉内接种了2株链球菌的12头猪，其中11头发生了关节炎。
In later work, 11 of 12 pigs inoculated intravenously with 2 strains of the organism developed arthritis.
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