실력은

실력은

"실력은" means "ability is" or "skill is" (topic marker included).

In this sentence, '실력은' (skill) is used as the subject of the sentence, referring to someone's outstanding capability.

그의 실력은 매우 뛰어납니다.

His skill is outstanding.

Here, '실력은' is used generically to discuss the concept of skill in relation to effort, conveying a general statement.

실력은 노력에 따라 달라질 수 있습니다.

Skill can vary depending on effort.

In this context, '실력은' is employed to highlight a characteristic of skill, emphasizing the necessity of consistent practice.

가장 중요한 것은 실력은 꾸준히 연마해야 한다는 점입니다.

The most important thing is that skill must be practiced consistently.