2、求正常情况下的费曼图和振幅似乎足够了,然而,再求抵消项(Counter term)和顶角函数,在QFT中是必要的,然而,在FeynArts中起到什么作用呢?如何使用这些结果呢?
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I started to explain the term, spelling out its once obvious connection with the counter culture of the sixties.
我便开始解释这个概念,解释它与六十年代反文化的关联。而这层联系,曾经非常显明。
None of these ideas will do much good in the short term; most of them would be entirely counter-productive.
所有的这些想法短期内都不会很奏效,大多数的效果反而适得其反。
Epidemiologists counter that such small studies don't mirror real-world conditions, and they can't examine the long-term risk of disease.
流行病学家反驳说,这样的小规模研究不能反映现实世界的情况,也无法衡量出患病的长期风险。
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