Collins Chinese Dictionary Plus (3rd edition), 2011:
heartbreaking [ˈhɑːtbreɪkɪŋ]
adj
[+ news, story] 令人伤(傷)心的 lìng rén shāngxīn de
- it was heartbreaking to watch
看着(著)真让(讓)人心碎 kànzhe zhēn ràng rén xīnsuì