performance与achievement的区别

performance是表演的意思，而achievement则是完成的意思，它们的区别可以从以下例子看出：

The performance last night was great, all viewers were happy, and this was 8th performance, it is a great achievement.

昨晚的演出相当好，所有观众都很高兴，这是我们第八次演出，很好地完成了我们的任务。