Terms for subject Mathematics containing be emphasized

English	Russian
for a real understanding of these facts it must be emphasized once more that the rational numbers are our own creation and that the rules 1 are imposed at our volition	наложены по нашему желанию
for a real understanding of these facts it must be emphasized once more that the rational numbers are our own creation and that the rules 1 are imposed at our volition	для действительного понимания этих фактов необходимо подчеркнуть ещё раз, что
it must be emphasized that	необходимо подчеркнуть, что ...