a fast and effective solution to a serious problem （解决某一问题的）灵丹妙药 Having a mentor is exciting but it's not a silver bullet for success. 拥有导师很令人兴奋，但这并不是成功的灵丹妙药。 There is no silver bullet to address growing inequality in the population. 没有解决人口不平等加剧的灵丹妙药。