You don't know about real loss, cause that only occurs when you love someone（something） more than you love yourself.
你不了解真正的失去，唯有爱别人胜于爱自己才能体会。

发音词汇语法讲解
1.音标讲解/发音细节
注意You don’t know这时候的语调

2.语音技巧
连读：that-only,real-loss
重读：You,don’t,know,real,loss,only,occurs,

love,someone,more,love,yourself.
弱读：about,the,cause,that,when,you,than,you

3.英语口语词汇:
occur /ə'kɝ/发生

4.英语口语翻译：
从理论上讲，这个问题不应该发生，但实际它却发生了。
In theory, this problem should not occur, but in reality it does.