tug at somebody's heartstrings
US /tʌɡ æt ˈsʌm.bə.diz ˈhɑːrt.strɪŋz/
UK /tʌɡ æt ˈsʌm.bə.diz ˈhɑːrt.strɪŋz/

1.
触动心弦, 打动人心
to cause strong feelings of love or sympathy in someone
:
•
The story of the lost puppy really tugged at my heartstrings.
那只走失小狗的故事真的触动了我的心弦。
•
Her sad eyes always tug at his heartstrings.
她悲伤的眼神总是触动他的心弦。