超额完成业绩的英文表达是 "exceeding performance targets"。这个说法来源于商业和经济领域，指的是一个企业或者个人达到或超过既定的业绩目标。下面是一些例句：

The company exceeded its performance targets for the quarter, with sales up 15% from the previous year.
Our sales team has been consistently exceeding performance targets, and as a result, we have seen a significant increase in profits.
The new marketing campaign has been a success, with many of our key metrics exceeding performance targets.

例句翻译：

这家公司本季度完成了超额业绩，销售额比去年增长了 15%。
我们的销售团队一直在超额完成业绩目标，因此我们的利润有了显著增长。
新的市场营销活动取得了成功，许多关键指标都超额完成了业绩目标。