Terms for subject Mathematics containing it is sufficient to

English	Russian
it is sufficient to prove that ...	теперь достаточно доказать, что ... (it is sufficient to prove that every finite subfamily of spheres has a non-void intersection)
it is sufficient to prove that every finite subfamily of spheres has a nonvoid intersection	непустое пересечение
it is sufficient to substitute the function f into the inequality	заменить функцию в неравенстве