1. This ignorance precluds the full theoretical calculation of wave forms necessary to compare with relevant observations.这种未知使我们无法作出所必需的理论计算,以与有关观测结果相比较.
relevant的短语搭配是：relevant failure、relevant range、relevant works等。relevant：adj.紧密相关的;切题的;有价值的;有意义的。