at a rate of

at a rate of 的音标是[əˈeɪt ə ˈreɪt ɪv]。基本翻译是“以……的速度”。速记技巧是可以在单词后面加上一个元音字母快速记忆。

at a rate of 的英文词源是拉丁语“ad rapum”，意为“按照速度”。

变化形式：通常在句子中作为固定短语出现，没有明显的变化形式。

相关单词：

rate of growth：增长速度

rate of exchange：汇率

rate of return：收益率

rate of consumption：消费率

rate of inflation：通货膨胀率

ratepayer：纳税人

rateable value：应课税价值

rateable account：应课税账户

rate-setting：设定利率

ratemaking：定价

以上这些单词都与“at a rate of”有着密切的关系，表示速度、比率或利率等概念。这些单词在英语中广泛使用，并涉及到经济、金融、统计等领域。

常用短语：

1. at a speed of

2. at a price of

3. at a time of

4. at a frequency of

5. at a rate of increase

6. at a rate of decay

7. at a rate of flow

例句：

1. The car is accelerating at a speed of 50 km/h.

2. The price of this product has increased at a rate of 10% per year.

3. They take turns to use the computer at a time of two hours each.

4. The frequency of the train service varies according to the demand.

5. The rate of increase in carbon dioxide emissions is alarming.

6. The rate of decay of this old building is very high.

7. The river flows at a rate of 5 meters per second.

英文小作文：

标题：Environmental Impact of Ecological Degradation on the Rate of Resource Depletion

As the world"s resources are depleted at an alarming rate, it is essential to recognize the role that ecological degradation plays in this process. Ecosystems that once provided clean air, water, and soil for human use are now being damaged and destroyed by human activities, leading to a decrease in the rate of resource renewal and an increase in resource depletion. This, in turn, has a negative impact on our environment and our ability to sustain life on earth. We must take immediate action to protect our environment and conserve resources to ensure a sustainable future for ourselves and future generations.