In modern linguistics,why synchronic study seems to enjoy priori

In modern linguistics,why synchronic study seems to enjoy priority over diachronic study?
【正确答案】：In modern linguistics, synchronic study seems to enjoy priority over diachronic study. The reason is that unless the various states of a language are successfully studied it would be difficult to describe the changes that have taken place in its historical development.Synchronic descriptions are often thought of as being descriptions of a language as it exists at the present day and most linguistic studies are of this type.