achievement什么时候可数，什么时候不可数

可数
有些句子前面可以加a的..
achievement
KK: []
DJ: []
n.
1. 达成;完成[U]
achievement of an ambition
抱负的实现
2. 成就,成绩[C]
The invention of the computer is a great achievement.
发明电脑是一大成就。

例句与用法:
1. Flying across the Atlantic for the first time was a great achievement.
首次飞跃大西洋是一项了不起的业绩。

2. I felt a great sense of achievement when I reached the top of the mountain.
当我到达山顶的时候，我有一种巨大的成就感。

3. Coming top in the exam was quite an achievement.
考第一是很了不起的成绩.

4. His breast/heart swelled with pride at his achievement.
他有了成绩而沾沾自喜.

5. You haven't realized the magnitude of her achievement.
你没有认识到她这一成就的重大意义。

6. At the ceremony he was presented with a scroll commemorating his achievement.
在典礼上，他被授予表彰他成就的卷轴。

7. The Apollo program was not so much a scientific achievement as a technical accomplishment.
阿波罗计划与其说是一项科学成果，不如说是一项技术成就。

8. Effort and achievement are always in full accord.
努力和成就总是相辅相承的。