effectless

effectless的音标为[ɪˈfektlɪs]，基本翻译为“无效的，无影响的”。速记技巧为“ef=不，fect=影响，less=没有的”。整体的意思是无效的，无影响的。

Effectless这个词的词源可以追溯到拉丁语“effectus”，意为“产生”或“实现”。它的形式变化主要涉及到词形变化和词义的演变。

变化形式：

1. 名词形式：effectlessness，意为“无效，无作用”。

2. 形容词形式：ineffective，意为“无效的，无效果的”。

相关单词：

1. Effect：词源同Effectless，意为“效果，作用”。

2. Affect：词源同Effectless，意为“影响，感动”。

3. Effectuate：词源同Effectless，意为“实现，执行”。

4. Non-effect：词源同Effectless，意为“无效果，无效力”。

5. Nullify：词源同Effectless和Null，意为“使无效，取消”。

6. Defective：词源同Effectless和defect，意为“有缺陷的，无效的”。

7. Ineffectual：词源同Effectless和ineffect，意为“无效的，无效果的”。

8. Inefficacy：词源同Effectless和efficacy，意为“无效力，无效果”。

9. Inertia：词源同Effectless和inert，意为“惯性，惰性”。

10. Inapplicable：词源同Effectless和applicable，意为“不适用，不合适的”。

以上单词都与Effectless有密切关联，它们在词义和用法上都有各自的特点。

常用短语：

1. no effect

2. have no effect

3. no effect on

4. have no effect on

5. no impact

6. have no impact

7. no effect on…

双语例句：

1. The medicine had no effect on his illness.

2. The exercise had no effect on her weight.

3. The new policy had no impact on the company"s profits.

4. The rain had no effect on the ground.

5. The decision had no effect on my opinion of him.

6. The medication had no effect on her symptoms.

7. The change in the weather had no effect on our plans.

英文小作文：

标题：Effects of Environmental Change on Human Life

In recent years, environmental change has become a hot topic, with its impact on human life becoming increasingly apparent. From the rise and fall of ecosystems to the spread of diseases, environmental change has a profound effect on our lives. However, we can take some simple steps to minimize its negative effects and maximize its positive impacts. Firstly, we can reduce our carbon footprint by using public transport, cycling or walking instead of private cars, and reducing our consumption of resources by using energy-efficient appliances and recycling waste materials. Secondly, we can plant more trees and take care of the environment to improve air quality and reduce pollution. Finally, we can support local businesses and encourage sustainable practices to ensure that our actions have a positive impact on the environment and our communities. By taking these simple steps, we can minimize the negative effects of environmental change and make a positive contribution to our planet and its future generations.