1 sentence

1. 这段刻骨铭心的爱情让他终生难忘。

   zhè duàn kè​gǔ​míng​xīn de ài​qíng ràng tā zhōng​shēng nán​wàng.

   This unforgettable love remains in his memory for a lifetime.

   Source: Dong Chinese Dictionary