to be very brave and calm under pressure
ser muy valiente y calmado bajo presión (ser muy valiente y calmado bajo presion)
"A firefighter must have nerves of steel to face danger every day."
"un bombero debe tener nervios de acero para enfrentar el peligro todos los días" (un bombero debe tener nervios de acero para enfrentar el peligro todos los días)
a true friend helps you in difficult times
to strongly criticize someone for something they did wrong
to organize or resolve a confusing situation
to admit that you have done something wrong
to gain knowledge through practical experience
the use of willpower to overcome physical problems