俄语 ⇄ 英语

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при необходимости 强调
一般	where applicable (Dianka); as appropriate (Юрий Гомон); if helpful (Alik-angel); if need be (TarasZ); in appropriate cases (grafleonov); if situation so requires (Alexey Lebedev); as warranted (ulkomaalainen); as the need required (Andrey Truhachev); if considered necessary (Johnny Bravo); if deemed necessary (Johnny Bravo); if such a need arises (Johnny Bravo); where needed (Alex_Odeychuk); if it is necessary; as may be required from time to time (D Cassidy); when necessary (dimock); when such a need arises (Johnny Bravo); where appropriate (Stas-Soleil); desirably (Svetozar); when relevant (spanishru)
专利	optionally (В настоящее время (~ c 2010 г.) рекомендуются только варианты "необязательно" и "при необходимости", являвшийся ранее допустимым "возможно" исключен HeneS)
医疗的	as the circumstances require (Andrey Truhachev); pro re nata (Andrey Truhachev); as the circumstance arises (Andrey Truhachev); in the circumstances (Andrey Truhachev); SOS (inn)
商业活动	on an as-needed basis (Candidates may be expected to work overtime, including weekends, and to travel on an as-needed basis. dumb rabies)
媒体	optionally
官话	if any (Alexander Matytsin); if proved necessary (Alexander Matytsin); as may be necessary (Alexander Matytsin); on as-needed basis (Alexander Matytsin)
库页岛	as needs dictate; if needed; as required; as the need arises
惯用语	in a pinch (VLZ_58)
数学	as the need arose; when needed; as may be required
正式的	should the need arise (dafni)
气象	observation (краткое общее указание о предполагаемых изменениях по окончании периода прогноза)
法律	as necessary (Alexander Matytsin); as needed (Alexander Matytsin); if required (Alexander Matytsin); where required (Alexander Matytsin); if appropriate (Leonid Dzhepko)
消防和火控系统	with the need for (чего-либо: действия/объекта OLGA P.)
电信	if desired (oleg.vigodsky); if necessary (oleg.vigodsky)
研究与开发	if applicable (igisheva); when appropriate (igisheva)
科学的	when required (igisheva)
编程	if relevant (ssn)
聚合物	optional (bonly)
航空	when applicable (ЛисаА)
运输	where necessary (Yeldar Azanbayev)
道路工程	where it is necessary to (Yeldar Azanbayev)
里海	when requested (Yeldar Azanbayev)
银行业	case of need (Yeldar Azanbayev)

при необходимости дайте: 1 短语, 1 学科

一般

1