Russian ⇄ Chinese Czech Danish English Finnish French German Hebrew Hungarian Italian Japanese Khmer Latvian Polish Portuguese Spanish Tajik Turkish Ukrainian Vietnamese

по необходимости stresses
gen.	PRN (обычно используется в медицинской рецептуре; pro re nata (lat.) – as needed. Literally, "for the thing born" Marina Lee); of perforce; perforce; as applies (Technical); as the occasion requires (Moscowtran); by perforce; as required (Andrey Truhachev); as the need required (Andrey Truhachev); as may be necessary (Andrey Truhachev); depending on the need (Sangina); out of necessity; whenever necessary (Alexander Demidov); where appropriate (Alexey Lebedev); as appropriate (Юрий Гомон); when requested (Vadim KKC); when necessary (Andrey Truhachev); when needed (Andrey Truhachev); upon force
Gruzovik	necessarily
adv.	of necessity
audit.	as applicable (Grebelnikov)
busin.	as necessary (Юрий Гомон)
inf.	needs (только с must, часто ирон.)
Makarov.	if and when necessary; if necessary; suit requirements; under the necessity of
math.	by necessity
med.	si opus sit (о приёме препарата Баян)
O&G, sakh.	as needed
pharm.	as the circumstances require (Andrey Truhachev); pro re nata (Andrey Truhachev); as the circumstance arises (Andrey Truhachev); in the circumstances (Andrey Truhachev); p.r.n. (mazurov); q.s. (применялось в рецептурах TatianaZima)
tech.	when required
по мере необходимости
oil	as needed (andrushin)

по необходимости: 135 phrases in 32 subjects

Accounting	1
Archaic	1
Automated equipment	2
Banking	1
Business	2
Computer networks	1
Construction	1
Contextual meaning	1
Drilling	1
General	46
Information security and data protection	5
Information technology	1
Latin	1
Law	7
Makarov	5
Mass media	3
Mathematics	1
Medical	4
Microsoft	1
Military	7
Nautical	9
Officialese	2
Oil / petroleum	2
Pharmacology	3
Polygraphy	2
Programming	8
Quality control and standards	1
Research and development	1
Sakhalin	2
Security systems	7
Technology	5
Trade unions	1