causative agent的音標是[?k??z?e?t?d ?e?d??nt]，基本翻譯是“致因劑； 致因因素； 原因”。速記技巧是：causative/agent/兩個單詞組合記憶。

Causative agent（致因物）這個詞源可以追溯到拉丁語causare，意為“引起，導致”。它的變化形式包括agent（代理人）、causal（因果的）、causality（因果性）等。

相關單詞：

1. Cause（原因）：Cause是causative agent的一個常見相關詞匯，表示導致某事發生的原因或因素。

2. Effect（效果）：Effect是cause的常見相關詞匯，表示由原因引起的結果或效果。

3. Action（行動）：Action是causative agent的一個相關詞匯，表示采取的行動或措施，以實現某種結果或效果。

4. Causeway（通道）：Causeway是cause的衍生詞，表示人工或自然形成的通道，通常用于連接兩個地點。

5. Causality（因果關系）：Causality是一個抽象名詞，表示導致某事發生的因素之間的聯系或關系。它也可以指對因果關系的探究和研究。

這些相關詞匯在英語中具有豐富的含義和應用，可以幫助我們更好地理解和使用causative agent這個詞源。

常用短語：

1. cause by (原因)

2. be caused by (導致)

3. be the cause of (造成)

4. cause agent (病因)

5. causal agent (病因)

6. causal factor (原因)

7. causative agent (病因)

例句：

1. The accident was caused by a sudden downpour.

2. The illness was caused by a virus infection.

3. The failure was due to a faulty component, which was the cause agent.

4. The rise in crime rate is due to the rise in poverty, which is a causal factor.

5. Smoking is a causative agent for lung cancer.

6. The causal agent of the disease has been identified as a bacterium.

7. The cause agent of the problem is clearly identified as the lack of resources and infrastructure.

英文小作文：

Causative Agents and Their Impact on Society

Causative agents are the factors that cause or contribute to a particular phenomenon or problem. They can be anything from diseases to environmental issues, and they have a profound impact on society.

For instance, the causal agent of a disease can affect individuals and families directly, while environmental causes can impact entire communities and even entire ecosystems. These agents can lead to social unrest, economic hardships, and even political instability.

Moreover, causative agents can be difficult to identify and address, as they often require long-term solutions and sustained efforts from governments, communities, and individuals. However, when they are identified and addressed effectively, the impact on society can be significant and positive.

In conclusion, causative agents are an important part of any phenomenon or problem, and they have a profound impact on society. Understanding their nature and impact is crucial for effective action and positive change.