can even recite sth backwards fluently—know sth thoroughly by heart;reel off sth fluently
? 他父親把那三百首唐詩都能～。His father knew those three hundred Tang poems so thoroughly by heart that he could even recite them backwards fluently.
倒背如流dào bèi rú liú
指把文章或書背得滾瓜爛熟。can recite sth. balkwards, know sth. thoroughly by heart, reef off sth. fluently