* Don't teach a pike to swim, a pike knows his own science Не учи щуку плавать, она сама это умеет; ср.: Не учи ученого
DO NOT TEACH A PIKE TO SWIM, A PIKE KNOWS HIS OWN SCIENCE
Англо-русский перевод DO NOT TEACH A PIKE TO SWIM, A PIKE KNOWS HIS OWN SCIENCE
English-Russian dictionary of English idioms. Англо-Русский словарь английских идиом. 2012