прежде всего

Прежде всего - first; first of all; in the first place; first and foremost; above all (когда речь идет об одном из вариантов)

 The results show first that, as in the Group 1 tests, the applied force does not appear to influence the wear rate.

 First of all, the general level of enhancement increases as the Reynolds number increases.

 The solution to tube failure due to internal deposition is to prevent the deposits from occurring in the first place.

 First and foremost, the entire steel industry must substantially increase profits to at least 6% of sales.

 Let us note how the introduction of new programming languages, LISP above all, greatly contributed to the progress in natural language processing.