Most skills require a minimum job level to be unlocked.

Observing artillery fire, even from above, requires training and skill.

A doctor's skill requires a monumental investment of money, time and effort.

It follows that the skills required by teachers themselves are also rapidly evolving.

He looks forward to the tape, but the skill he is learning requires the entire body.

It is astonishing that educated people such as teachers would think learning a skill does not require intelligence.

Yet consider what genteel skills the game itself requires.

The skills involved also tend to be fairly general and do not require special schooling, so the investment in human capital is minimal.

Active skills require stamina points (blue bar) to be activated.

It is an elusive diagnostic skill requiring much patience and experience.