If something strikes a chord, it causes people to approve of it or agree with it.

Their policy on childcare has struck a responsive chord with women voters. 该党在儿童保育设施方面的政策赢得了女性选民的热情支持。

Her speech struck a sympathetic chord among business leaders. 她的演讲博得了商界领袖们的共鸣。

If something strikes a chord, it causes people to remember something else because it is similar to it.