potency

1. N-UNCOUNT Potency is the power and influence that a person, action, or idea has to affect or change people's lives, feelings, or beliefs. 影响力

All their songs have a lingering potency. 他们所有的歌曲都有挥之不去的影响力。

2. N-UNCOUNT The potency of a drug, poison, or other chemical is its strength. (毒品、药品等的) 效力

Sunscreen can lose its potency if left over winter in the bathroom cabinet. 防晒霜在盥洗室柜子里放置一个冬天后会失去效力。