strike 意思是「擊打、敲"，chord意思是「和弦"，strike a chord意思是「敲擊和弦」，引申為「引起共鳴」，得到更多人的同情和理解。
看看老外聊天時怎麼用strike a chord：
A How's the music concert last night？
B It's pity that you couldn't come with us.The music strikes a chord with listener that even some people were moved to tears！
A 昨晚的音樂會怎麼樣？
B 好可惜你昨天沒有一起來，音樂引起了聽眾的共鳴，甚至有些人被感動到哭了呢！
strike a chord例句精選：
His book is a blockbuster because it strikes a chord with many readers.
他的書非常暢銷，因為它打動了許多讀者的心弦。
But in the end, good movies are not only about the cast, the setting and the story – they have something extra which strikes a chord with the viewer.
但說到底，好的電影不僅僅要有強大的演員陣容，唯美的背景畫面和動人的故事情節，還需要有能引起觀眾共鳴的特質。
某人的感受得到大家的同情和理解。
strike a sour note 喚起不好的回憶
Never play this song in front of Ursula.It seems to strike a sour note of her ex-boyfriend.
別在厄休拉面前放這首歌。這首歌似乎會喚起她與前男友的傷心往事。
strike up the band 讓事物開始進行
Everything is ready.Now is the moment to strike up the band.
萬事俱備。現在就開始進行。