free of charge的音標為[fri? ?v ?ɑ?ts]，基本翻譯為“免費”，速記技巧為：free（自由）+of（沒有）+charge（收費）→免費。

英文詞源：free of charge來源于拉丁語“freius”，意為“免費的”。

變化形式：free of，free，charge。

相關單詞：

1. free：adj.免費的，自由的；v.釋放，使自由。

2. gratis：adv.免費地。

3. unchargeable：adj.無需收費的。

4. uncharge：v.免除費用。

5. freeware：n.免費軟件。

6. freemium：n.免費增值模式，一種軟件定價策略，允許用戶免費使用基礎版本，但需要付費以獲取額外功能或高級版本。

7. unchargeable debt：無需償還的債務。

8. chargeless：adj.無收費的。

9. unchargeable event：無需支付費用的事件。

10. freehold：n.永久產權，指土地使用權不受時間限制的房產產權。

以上這些單詞都與“free of charge”這個短語有關，表示免費或無需支付費用。

常用短語：

1. free of cost

2. free of charge

3. free of any charge

4. free of any fee

5. free of any obligation

6. free of any penalty

7. free of any cost

例句：

1. I will provide you with the information for free of charge.

2. We will deliver the goods to you free of charge.

3. You can use our service without any charge.

4. She agreed to help us without any obligation or cost.

5. The penalty for breaking the law is to pay a fine, but we are willing to do it free of charge.

6. The software is available for free of cost.

英文小作文：

Free Service

In this world, there are many people and organizations who provide free services to the public. These services range from medical care, education, transportation, and more. These organizations believe that it is their responsibility to help those who need it the most, regardless of their background or status.

One example is a non-profit organization that provides food and shelter to homeless people. They do this free of charge because they believe that everyone deserves a chance at a better life. Another example is a volunteer-run clinic that offers medical care to those who cannot afford it. They provide treatment and advice for various health conditions, free of cost, to ensure that people receive the care they need.

These organizations demonstrate the importance of kindness and compassion in our society. By providing free services, they show that we should not judge a person by their circumstances, but rather by their character and potential. We should all strive to be like these organizations and help those who need it the most, regardless of our own situation or resources.