是可數(shù)也是不可數(shù)，依據(jù)語境判斷。achievement的基本意思是“完成，達到”，指達到所期望的目標的過程，是抽象名詞，不可數(shù)。achievement還可用作可數(shù)名詞，常指因努力和技巧而取得的“成就，成績”。

achievement的例句

Effort and achievement are always in full accord.

努力和成就總是相輔相承的。

You haven't realized the magnitude of her achievement.

你沒有認識到她這一成就的重大意義。

I felt a great sense of achievement when I reached the top of the mountain.

當我到達山頂?shù)臅r候，我有一種巨大的成就感。

Only the achievement of these goals will bring lasting peace.

只有達成這些目標才會帶來持久的和平。

To live together harmoniously as men and women is an achievement.

夫妻能和睦相處就是一種成就。

Steve uncorked bottles of champagne to toast the achievement.

史蒂夫打開幾瓶香檳酒慶功。