notadictionary.com
この間、弊社で行われた救急救命講習を受けた時の僕、やらかす。
→ “I totally messed up during the emergency training we had at my company the other day.”
この kono = this (demonstrative adjective)
間 ma = time / period (noun)
弊社 heisha = my company (humble business term)
で de = at / in (location particle)
行われた okonawareta = was held / conducted (passive past of 'to do')
行 yu = go / perform
わ re = causative/passive marker
れた reta = past tense ending
救急 kyū¹kyū¹ = emergency (noun)
救 kyū¹ = save / rescue
急 kyū¹ = urgent / quick
救命 kyū¹mei = life-saving (noun)
救 kyū¹ = save / rescue
命 mei = life
講習 kō¹shū¹ = training course (noun)
講 kō¹ = lecture / talk
習 shū¹ = learn / practice
を o = object marker particle
受けた uketa = received / took (past of 'to receive')
受 u = receive
けた keta = past tense ending
時 toki = time / when (noun)
の no = possessive/attributive particle
僕 boku = I (masculine pronoun)
やらかす yarakas-u = to mess up / to botch (slang verb)