来自 sum,总结，概括，-ation,名词后缀。

1. What he said was a fair summation of the discussion.

他这番话对讨论作了恰当的总结。

2. The defense attorney phrased his summation at last.

最后,辩护律师作了辩论总结.

3. Her introduction is a model of fairness, a lively summation of Irish history.

她的导论是客观公正的典范，是对爱尔兰历史的生动概括。

4. The electrostatic summation must be evaluated for an explicIt'set of ion position.

静电能的加和必须根据离子的具体位置来计算.

5. The exhibition was a summation of his life's work.

这次展览汇集了他一生中典型的作品.