Both Uses
proficiency
in
Flags of Our Fathers
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- He did not know English when he began first grade; by the end of the year he was so proficient in it that he skipped the second.†
Chpt 2. *proficient = skillful
- They were proficient in the techniques of war.†
Chpt 5.
Definitions:
-
(1)
(proficiency) skillfulness in something
- (2) (meaning too rare to warrant focus)