attenuated
adj. （力量或效果）衰减的；（人）瘦长的
v. 使减弱；使变细；稀释（attenuate 的过去式和过去分词）
例句
The live-attenuated vaccine is different.
减毒活疫苗不同。
The live-attenuated vaccine is considered the most effective, but there is a worry: what might happen once these viruses wake up?
减毒活疫苗被认为是最有效的，但有一个问题：一旦这些病毒苏醒，会发生什么？
Distance decay was attenuated by increased levels of maternal education.
随着母亲教育水平的提高，距离衰减减弱。
