To prepare to work hard.
Prepararse para trabajar duro.
"Let’s roll up our sleeves and get started."
"Vamos a arremangarnos y empezar."
to survive, one must adjust to changing conditions
to make a significant discovery or achievement
to have a very good and friendly relationship
to practice and improve one’s cognitive abilities
to achieve the highest position in a company or field
to prepare for all possible outcomes; to be cautious