长情的告白英文怎么说

"长情的告白" (cháng qíng de gào bái) 可以用 "a heartfelt declaration of love" 来表达。这个表达方式源自英文中 "heartfelt" 这个形容词，意思是真诚的、由衷的。

例句：

She made a heartfelt declaration of love to him in front of everyone at the party. 她在聚会上当着所有人的面向他做了一个真诚的爱的告白。
He finally mustered up the courage to make a heartfelt declaration of love to her. 他终于鼓起勇气向她做了一个真诚的爱的告白。
She was touched by his heartfelt declaration of love and knew that he was the one for her. 她被他真诚的爱的告白感动，知道他就是她的命中注定的那个人。