persistence

n. /pərˈsɪstəns/ B2

坚持不懈；持续存在

The determination to continue doing something despite difficulties.

仙境例句

With great persistence, a little ant carried a crumb all the way up the mushroom.

一只小蚂蚁锲而不舍，把一粒面包屑一路搬上了蘑菇顶。