tireless

adj.不疲劳的

不知疲倦的；坚持不懈的；不停的

形容词

1、She is a tireless worker who never gives up until the job is done.
她是一个不知疲倦的工作者，直到完成工作之前都不放弃。
2、Despite his busy schedule, he remains tireless in his pursuit of his goals.
尽管他的日程很忙，但他在追求目标的过程中一直都是不知疲倦的。