Definition
To be remarkably effective or successful, often in a way that is surprisingly quick or easy.
十分奏效（带惊喜）
This method worked like a charm for me; I wish I had known about it sooner.
这个方法对我来说非常有效；我真希望早点知道它。
I tried everything, but only this little trick worked like a charm.
我试了各种方法，但只有这个小技巧非常有效。
She tried drinking hot tea in the morning to soothe her sore throat, and it worked like a charm.
她早上喝热茶来舒缓喉咙痛，结果非常有效。