吃透英语课本，提升在校竞争力
n. 坚持；毅力
复数：persistences
the persistence of high unemployment
居高不下的失业率
Her persistence paid off when she was offered the job of manager.
她得到了经理的职位，不懈坚持终于有了回报。
‘Why can’t I come?’ repeated Will with dogged persistence .
“我为什么不能去？”威尔不死心地又问了一遍。
persistence of vision
视觉暂留；视觉残留；持续视觉
n.持续；固执；存留
duration
standing
