例句與造句

1. The main mathematical tools to study critical points are renormalization group, which takes advantage of the Russian dolls picture or the self-similarity to explain universality and predict numerically the critical exponents, and Variational perturbation theory, which converts divergent perturbation expansions into convergent strong-coupling expansions relevant to critical phenomena.
2. In 1984 86, he developed a variational method for the approximate calculation of path integrals, which has led to a powerful method of converting divergent perturbation expansions into convergent strong-coupling expansions ( variational perturbation theory ) and, as a consequence, to the most accurate determination of critical exponents measured in satellite experiments.
3. It's difficult to find variational perturbation in a sentence. 用variational perturbation造句挺難的