to work hard and focus on something
trabajar duro y enfocarse en algo (trabajar duro y enfocarse en algo)
"If you want to succeed, you have to put your nose to the grindstone."
"Si quieres tener éxito, tienes que trabajar duro." (Si quieres tener éxito, tienes que trabajar duro)
a situation in which virtue is rewarded and vice is punished...
to encourage someone to stay hopeful and not give up
feeling very worried or tense because of problems
to deal with life and its challenges confidently
to persuade someone forcefully
you have to work hard to achieve success