七秒记忆我的少年七秒记忆我的姑娘
[qī miăo jì yì wŏ de shăo nián qī miăo jì yì wŏ de gū niáng]
Refers to the concept of 'seven-second memory' often associated with goldfish. Here it expresses both the youth and possibly transient or fleeting nature of past relationships or memories between the person and their lover.