**一、基本释义**

"Add up" 是一个英语短语动词,主要表示“加起来”或“合计”的意思。在数学运算中,它指的是将两个或多个数字相加。但在更广泛的语境中,"add up" 也可以表示“合乎逻辑”或“有意义”的概念,即所有事实、证据或论点组合在一起时形成一个合理的结论。

1. **数学意义**:

   - "The total cost adds up to $100."(总费用加起来是100美元。)

2. **逻辑意义**:

   - "Her story doesn't add up; there must be something she's not telling us."(她的故事不合逻辑,她肯定有什么没告诉我们。)

**二、用法**

1. **加法运算**

   - "Add up these numbers: 5, 7, and 9."(把这些数字加起来:5,7,和9。)

   - "When you add up all the expenses, you'll see how much we've saved."(当你把所有的花费都加起来,你就会看到我们省了多少钱。)

2. **逻辑推理**

   - "The evidence doesn't add up; he can't be the thief."(证据不相符,他不可能是小偷。)

   - "All the details add up to one conclusion: she was lying."(所有的细节加起来只有一个结论:她在撒谎。)

**三、同义词辨析**

1. **Accumulate**: 强调逐渐增加或积累的过程。

   - "The bills have accumulated over the month, and now we need to pay them off."(这个月的账单累积起来了,现在我们需要付清。)

2. **Total**: 常用于计算总数或总额。

   - "What's the total number of students in your class?"(你们班的学生总数是多少?)

3. **Sum**: 与"add up"相似,用于数学上的求和,也用于抽象事物的总结。

   - "Sum the figures for me, please."(请帮我把数字加一下。)

   - "In summary, the project was a great success."(总而言之,这个项目非常成功。)

4. **Consistent**: 当用于逻辑意义时,表示事物的一致性或协调性。

   - "Her statements are not consistent with the facts."(她的陈述与事实不符。)

5. **Make sense**: 表示某事在逻辑上说得通或有道理。

   - "It doesn't make sense to spend so much on a single item."(花这么多钱买一件商品是没有道理的。)

**四、例句**

1. 数学意义:

   - "Let's add up the scores to determine the winner."(让我们把分数加起来确定胜者。)

2. 逻辑意义:

   - "Her explanation doesn't add up; there must be more to the story."(她的解释站不住脚,这里肯定还有其他情况。)

3. 同义词替换:

   - "The expenses totalled $500, which is more than we expected."(费用总计500美元,比我们预想的要多。)

   - "The inconsistencies in his story don't make sense; he's clearly hiding something."(他故事中的矛盾之处毫无逻辑,他显然在隐瞒什么。)