covary

"covary"音标为[kəʊ"veərɪ] ；基本翻译为"协变"；速记技巧为：协变变化（change covariantly）。

"covary"这个词的英文词源可以追溯到拉丁语"co-vary"或"con-vary"，意为"to vary together"或"to vary in the same direction"。它的变化形式包括过去式"covaried"，过去分词"covaryd"和现在分词"covarying"。

相关单词：

1. "variable" - 这个词与"covary"有相似的含义，表示变化或可变的，它源自拉丁语"varius"，意为"多样的"。

2. "covariance" - 这个词表示两个或多个变量之间变化方向的一致性，源自"covary"。

3. "vary" - 这个词表示变化，源自"varius"，与"covary"有相似的含义。

4. "variance" - 这个词表示变化或差异，源自"varius"。

5. "varying" - 这个词表示变化的，与"covarying"有相似的含义。

6. "countervail" - 这个词表示抵消或对抗变化，源自拉丁语"counter-vary"，意为相反的变化。

7. "concomitantly" - 这个词表示同时发生或伴随变化，源自拉丁语"con-vary"，意为在相同方向上变化。

8. "varyingness" - 这个词表示变化的程度或状态，可以用来描述某种事物变化的程度或频率。

9. "covariances" - 这个词表示协方差，是统计学中的一个概念，用于描述两个或多个变量之间的变化关系。

10. "countervailing" - 这个词表示抵消或对抗不利的变化，与"countervail"有相似的含义。

常用短语：

1. covary with 与...相关

2. covary in a certain way 以某种方式相关

3. covary over time 随着时间变化而相关

4. covary closely 紧密相关

5. covary in opposite directions 相反方向相关

6. covary randomly 随机相关

7. covary in a complex way 复杂相关

例句：

1. The prices of stocks covary with the level of interest rates.

2. The amount of rainfall covaries with the temperature in a certain region.

3. Over time, the stock market returns covary with the level of inflation.

4. The two variables covary closely, indicating that they are related to each other.

5. The direction of travel for fuel prices covaries with that for the exchange rate.

6. The amount of rain and temperature covary randomly on a daily basis.

7. The relationship between the two variables covaries in a complex way, making it difficult to predict their future behavior.

英文小作文：

Covariation is a concept that refers to the relationship between two variables where they change together or are related in some way. In my opinion, covariation is essential for understanding the interrelationships between different variables and how they influence each other.

For example, consider the relationship between temperature and rainfall. Typically, as temperature increases, there is an increase in rainfall, and vice versa. This is an example of covariation because the two variables change together or are related in some way.

Another example is the relationship between stock market returns and inflation. Typically, as inflation increases, stock market returns decrease, and vice versa. This is another example of covariation because the two variables are related to each other in a certain way and change together over time.

In conclusion, covariation is a fundamental concept that helps us understand how different variables interact and influence each other. Understanding covariation can help us better predict future trends and make better decisions based on the interrelationships between different variables.