sum

詞意辨析：

quantity, amount, number, sum

這些名詞均有“總數、總量”之意。
quantity: 書面用詞，指事物的總量和總數量，側重大批計量，含準確測量的意味。
amount: 普通用詞，與quantity近義，但強調整體，指把所有數量、重量及度量歸併在一起得出的總數。
number: 普通用詞，指人或物的數目，強調數的概念。
sum: 普通用詞，指簡單加算的結果。

total, sum, whole

這些名詞均有“總數、全體”之意。
total: 指總量之大，強調每一構成部分或成分均被計算在內。
sum: 指兩個或更多的數目相加的總和。
whole: 著重其中沒有部分或成分被忽略不計。　

詞型變化：

動詞過去式:summed 過去分詞:summed 現在分詞:summing 第三人稱單數:sums sum

英文解釋：

名詞 sum:

1. a quantity of money
   同義詞：sum of money, amount, amount of money
2. a quantity obtained by the addition of a group of numbers
   同義詞：amount, total
3. the final aggregate
   同義詞：summation, sum total
4. the choicest or most essential or most vital part of some idea or experience
   同義詞：kernel, substance, core, center, essence, gist, heart, heart and soul, inwardness, marrow, meat, nub, pith, nitty-gritty
5. the whole amount
   同義詞：total, totality, aggregate
6. the basic unit of money in Uzbekistan
7. a set containing all and only the members of two or more given sets
   同義詞：union, join

動詞 sum:

1. be a summary of
   同義詞：summarize, summarise, sum up
2. determine the sum of
   同義詞：total, tot, tot up, sum up, summate, tote up, add, add together, tally, add up

sum

英文造句：

1. Is that the sum of what you've done in the last two years?
   這就是你最近兩年中完成的全部數量嗎？
2. The last section sums up all the arguments on either side.
   最後一部分總結了雙方的全部論點。
3. The sum of 5 and 3 is 8.
   五加三的總和是八。
4. I had to spend a large sum of money to get it back.
   我得花一大筆錢才把它弄回來。