此恨绵绵

Explanation: Rain: continuity of the look. This grudge on my mind, never gone. 　　Source: Tang Bai "Everlasting Regret" forever and sometimes do, sorrow was everlasting period. " 　　Examples: When is the time, a solitary, unaccompanied ... ... ~, Camps that they have a very! (Qing Shen Fu "Fu" Volume III)