刻苦工作 meaning in English

work assiduously
work strenuously

Hard work never killed anybody . ’ but why take the risk
“刻苦工作从未害死过谁！ ”但为什么要冒这个险呢？
He s looking quite blooming and working very hard , and very hopeful
他正在容光焕发，充满着希望地刻苦工作着。
As if he hadn t been working , robbing sleep , exhausting life , in order to be worthy of her
好像为了配得上她他并没有刻苦工作，剥夺睡眠，榨干了生活似的。
But through hard work , advice from some good mentors and continuing education , i have come a long way
但是经过我的刻苦工作，从良师益友那里得到一些建议以及深入学习，我已经懂得了很多。