He said he had difficulty mastering the Jets' defensive schemes.

His difficulty mastering the skills of governance has left the city largely rudderless.

In what proved to be the Aeros' final season, Knicely showed that he still had no difficulty mastering minor league pitching.

Westerners generally have difficulty mastering it.

Vincent has also some difficulty mastering that Jacques Chirac is the French president and cybercafés are trendy.

Geckos have no difficulty mastering vertical walls and are apparently capable of adhering themselves to just about any surface.

"Many people have difficulty mastering it, Caramon," the woman said soothingly.

Originally slated to play four roles, including that of the Texan B-52 bomber pilot Major Kong, the actor had difficulty mastering the accent.

The Avatar traditionally has the greatest difficulty mastering the element most opposite of the Avatar's personality.

Consumers had difficulty mastering its operating system, which was designed by Go.