n.金额；总数；要点

v.概括；总结；归纳；总计

I had to spend a large sum of money to get it back. 我得花一大笔钱才把它弄回来。

I save a nice little sum out of my wages each week. 我从每周的工资中节省一笔可观的金额。

The sum of 5 and 3 is 8. 五加三的总和是八。

Is that the sum of what you've done in the last two years? 这就是你最近两年中完成的全部数量吗？

What I just said is the sum of the book. 我刚才所说的是这本书的要点。

We can sum up the main point of the lesson in three sentences. 我们可以用三句话来概括本课要点。

So, to sum up, we need to concentrate on staff training. 概括地说，我们需要集中精力进行职工培训。

Please sum up what you said just now. 请把你刚才说的总结一下。

Now, I sum them up in 3 main points. 下面，我将其归纳为三点。

These instances sum up to several dozen. 这些例子总计达数十个。

sum作名词是“算术,总和”的意思,转化为动词作“总结,合计”解,一般指为了对某一事物有个大概的了解而用数字等方式对其进行统计,从而得出结论,强调结果而不强调方法。

sum可用作不及物动词,也可用作及物动词,常与up连用,表示合并成一新的整体以产生一种单一而有力的效果。

sum的过去式和过去分词均为summed。