constant

constant的音标是[ˈkɒnst(ə)nt]，基本翻译是“不变的；持续的”。记忆技巧如下：常（con）稳（stant）就是稳恒电流。它也可以通过和日常生活中的事物进行联想来加强记忆，如constant kettle（恒温壶）等。

英文词源：源自拉丁语“constans”，意为“坚定的，不变的”。

变化形式：复数形式为“constants”，现在分词为“constant”。

相关单词：

1. consistent：adj. 一致的，始终如一的；持续的。

2. constantine：n. 君士坦丁（古罗马皇帝）。

3. constellation：n. 星座。

4. constantinople：n. 君士坦丁堡（古名拜占庭）。

5. constantinid：adj. 君士坦丁王朝的。

6. constantinopolitan：adj. 君士坦丁堡的。

7. constantinopolitanus：n. 君士坦丁堡的居民。

8. constantia：n. 坚定的信仰。

9. constipation：n. 便秘。

10. constipate：v. 使便秘，使难产。

以上单词都与“constant”有着密切的联系，表示坚定、不变的意思，同时也反映了人类对自然、历史、文化等方面的探索和认知。

常用短语：

1. constant flow

2. constant rate

3. constant temperature

4. constant velocity

5. constant effort

6. constant condition

7. constant supply

例句：

1. The river flowed in a constant stream.

2. The economy is growing at a constant rate of 3%.

3. The temperature in the room was kept at a constant level.

4. The athlete maintained a constant velocity throughout the race.

5. Constant effort is required to improve one"s skills.

6. The condition of the equipment should be constant to ensure optimal performance.

7. The supply of fresh water to the region is constantly monitored and maintained.

英文小作文：

The importance of maintaining a constant environment

Maintaining a constant environment is crucial for ensuring the optimal performance of various systems and components, from electronic devices to biological organisms. A constant temperature, humidity, and pressure help to prevent wear and tear on equipment and reduce the risk of malfunctions. In the case of living things, a constant environment helps to maintain homeostasis, ensuring that bodily functions operate smoothly and efficiently.

For example, constant temperature is essential for maintaining the efficiency of electronic components, such as computers and automobile engines. A rise in temperature can lead to increased wear and tear, reducing the lifespan of these devices. Similarly, a constant supply of water is necessary for plants to grow and thrive, while fluctuations in humidity can have a negative impact on their health and growth.

On a larger scale, a constant environment is crucial for ensuring the safety and comfort of passengers in aircraft, ships, and other vehicles. A constant velocity of movement helps to reduce motion sickness and ensures that passengers can focus on their journey without being distracted by discomfort.

In conclusion, maintaining a constant environment is essential for ensuring the optimal performance of various systems and components, both man-made and natural. It is therefore crucial to monitor and maintain these conditions to ensure the health and well-being of individuals and communities alike.