在昨晚的宴会上，托尼的举止有如一头猪似的粗鲁。
人们还需要进一步研究来证实，猪流感在在美国蔓延而在欧洲并未引起流行这一状况是否就是因为与之类似的洲际易感性的差异。
Whether a similar difference in continent-wide susceptibility explains why swine flu is spreading in the United States but standing still in Europe will take a while to figure out.
其他的研究者已经在猪，山羊，绵羊和猴子身上做过相似的试验。
Other researchers have carried out similar experiments with pigs, goats, sheep and monkeys.
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