Apparently, the definition of function Vsi appearing in the relation (2) is given only in the next page (page 11, relation (3)). It would be worth to give it just after the relation (2), on the page (9).
Apparently, the definition of function Vsi appearing in the relation (2) is given only in the next page (page 11, relation (3)). It would be worth to give it just after the relation (2), on the page (9). 显然，关系（2）中出现的函数Vsi的定义仅在下一页（第11页，关系（3））中给出。 在页面（9）上的关系（2）之后给它是值得的。