认真付出的爱被你丢掉谷底
[rèn zhēn fù chū de ài bèi nĭ diū diào gŭ dĭ]
'Love given sincerely was thrown into valley bottom by you' symbolically shows the person's disappointment of a failed romance, wherein love and sincerity received no return. It describes a very sad moment that can be used in many types of relationships beyond just romantic ones - any situation where genuine care wasn't recognized by others.