persistence
/-əns; -əns/ n[U]
(a) being persistent坚持不懈; 执意; 持续; 存留
His persistence was rewardedwhen they finally agreed to resume discussions. 他们终於同意继续谈判, 这是他坚持不懈的结果.
(b) continuing existence 继续存在
The doctor couldn't explain the persistence of the high temperature. 医生无法解释高烧何以持久不退.