bang something ↔ out phrasal verbphr v informal a) APMto play a tune or song loudly and badly on a piano 〔在钢琴上〕使劲乱敲地弹奏〔乐曲或歌曲〕
b) WRITEto write something in a hurry, especially using a keyboard 〔尤指用键盘〕匆忙赶写，匆匆地打出来
→ bang something ↔ out at bang2(PHRASAL VERB)