In spite of the very close affinity between the variational theorems and the principle of virtual work the study of the former is worth-while.
尽管变分定理与虚功原理之间有很紧密的相似关系，然而对前者的研究仍然是有价值的。
2
In the past, the Affinity Labeling and Site-Directed Mutagenesis are the primary methods to study amine receptor.
过去主要是通过亲和标记和点突变等实验方法进行研究。
3
In this study, a new method based on immobilized metal affinity chromatography (IMAC) for screening phage antibody library against antigen in solution was reported.