The insurgents have shown a keen ability to adapt and strengthen their tactics.

I guess these are the colors most prevalent in the natural world, so we have evolved keen abilities to distinguish among their combinations.

Adult Goldens love to work, and have a keen ability to focus on a given task.

Through keen ability, The Shadow had penetrated to a spot where he would dwell secure.

They have keen problem-solving abilities, and are entertaining to watch.

Pigeons also have a keen ability to distinguish the relative size of numbers and the duration of time, he said.

The little man's trusting nature had no concept of sarcasm and a keen ability not to hear things that might upset him.

He also had a keen artistic ability, and many of his drawing survive today.

Osceola was quickly becoming one of the fiercest leaders among the Seminoles despite his keen ability to reason.

Each carried their own keen abilities, excelling in a certain power.