Strizki's principal achievement lies in inventing a clever system from components that were already at hand.

Both of them appear to be financial disappointments, but this bad news doesn't detract from Rudin's principal achievement, getting movies made.

His principal achievement in office, officials said, was to ease tension in relations with neighboring Syria.

To continue talking would count as "the principal achievement," he said.

Authors are assigned to these periods by years of principal achievements.

His principal achievements were the army bills of 1892 and 1893, and the commercial treaty with Russia in 1894.

Scholars think ethnographic research there was one of the voyage's principal achievements.

Doing this for the first time was Cairo's principal achievement.

Whatever its goals, the site's principal achievement may be to inflame Muslim opinion.

That was a principal achievement of the Nuremberg trials.