"covary"音標為[k??"ve?r?] ；基本翻譯為"協變"；速記技巧為：協變變化（change covariantly）。

"covary"這個詞的英文詞源可以追溯到拉丁語"co-vary"或"con-vary"，意為"to vary together"或"to vary in the same direction"。它的變化形式包括過去式"covaried"，過去分詞"covaryd"和現在分詞"covarying"。

相關單詞：

1. "variable" - 這個詞與"covary"有相似的含義，表示變化或可變的，它源自拉丁語"varius"，意為"多樣的"。

2. "covariance" - 這個詞表示兩個或多個變量之間變化方向的一致性，源自"covary"。

3. "vary" - 這個詞表示變化，源自"varius"，與"covary"有相似的含義。

4. "variance" - 這個詞表示變化或差異，源自"varius"。

5. "varying" - 這個詞表示變化的，與"covarying"有相似的含義。

6. "countervail" - 這個詞表示抵消或對抗變化，源自拉丁語"counter-vary"，意為相反的變化。

7. "concomitantly" - 這個詞表示同時發生或伴隨變化，源自拉丁語"con-vary"，意為在相同方向上變化。

8. "varyingness" - 這個詞表示變化的程度或狀態，可以用來描述某種事物變化的程度或頻率。

9. "covariances" - 這個詞表示協方差，是統計學中的一個概念，用于描述兩個或多個變量之間的變化關系。

10. "countervailing" - 這個詞表示抵消或對抗不利的變化，與"countervail"有相似的含義。

常用短語：

1. covary with 與...相關

2. covary in a certain way 以某種方式相關

3. covary over time 隨著時間變化而相關

4. covary closely 緊密相關

5. covary in opposite directions 相反方向相關

6. covary randomly 隨機相關

7. covary in a complex way 復雜相關

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.