英语翻译No one instrument fulfills allrequirements.To carry forw

英语翻译
No one instrument fulfills allrequirements.To carry forward the metaphor of a window,once it is clear whetherthat instrument can offer a view of the target concept,one must also make surethe view is clear,precise,and consistent each time any person looks throughthat window — attributes that are shown by the validity and reliability of ascale.