To know everything about something 今日短语 短语“ins and outs”的字面意思是“进进出出，里里外外”，但它实际所表达的意思则是“详情、细节”，一件事情的“来龙去脉”，常用来形容一个人对什么事情了如指掌，一清二楚。 例句 I’ve been doing this job for ten years, so I know the ins and outs ...