"extensive mastery" is a correct and usable phrase in written English.
It can be used to describe a person's mastery of a topic or subject, usually to a high degree. For example: His extensive mastery of French literature allowed him to pinpoint the exact source of the quotation.
2 Specifically, the American College of Surgeons, Division of Education, has stated that mastery in surgery requires extensive and immersive experiences.
Though he remained faithful throughout his life to that school, of whose doctrines he had an unrivalled mastery, he also acquired an extensive knowledge of contemporary Islamic sources and disciplines: the Qurʾān (Islamic scripture), the Ḥadith (sayings attributed to the Prophet Muhammad), jurisprudence (fiqh), dogmatic theology (kalām), philosophy, and Sufi (Islamic mystical) theology.
Both demand a doctoral degree that requires extensive study of science and math, and mastery of exacting methods and techniques.
Fully capturing students' mastery of complexity would require extensive research for the other nine dimensions plus interactions among dimensions, applied to multiple biology concepts an overwhelming proposition.
Unlike SSK researchers and other professional students of the scientific enterprise, judges are not subject to peer scrutiny or updating with respect to their mastery of what is, in the end, an extensive domain of philosophical, sociological, and political scholarship.
His mastery of improvised form was unprecedented in jazz; he used an extensive repertoire of devices to develop simple material into dense, complex, extended, but structurally unified works.
Premise of the study: Because plant identification demands extensive knowledge and complex terminologies, even professional botanists require significant time in the field for mastery of the subject.
In this purpose the mastery of the synthesis process of Fe3O4Au x Ag y nanocomposites may be a milestone for their extensive application.
Part of an extensive UK tour (with a DVD in the shops next week), this residency provides another chance to enjoy his righteous fire and outré mastery of language.
Some mastery, some inaction!
