hard-and-fast

hard-and-fast的音标为["hɑːdənæft]（谐音：哈登啊夫），意思是“不可更改的，不可动摇的”。

基本翻译为“不可改变的，固定的”，表示某事已确定，无法改变。速记技巧可以尝试使用谐音法进行记忆，例如：“哈登啊夫，一锤子买卖”。

希望以上信息对您有帮助。如果需要更多记忆技巧，建议咨询专业人士。

Hard-and-fast这个词源可以追溯到古英语，它是由hard（坚硬的）和fast（牢固的）两个词组成的。这个词的意思是指坚固、稳固的，常用于描述物体或事物的稳定性。

变化形式：在英语中，hard-and-fast的形式没有发生过变化，一直保持为hard-and-fast。

相关单词：

fasten：这个词的意思是“固定、系牢”，它是由hard-and-fast派生出来的，表示将物体固定在一起。

firmly：这个词的意思是“坚定地、稳固地”，它也与hard-and-fast有关，表示物体的稳定性。

secure：这个词的意思是“安全的、可靠的”，它也与hard-and-fast有关，表示物体或事物的稳定性，可以让人感到安全和可靠。

以上三个单词都是与hard-and-fast相关的常用词汇，它们都表示物体的稳定性、牢固性或安全性。此外，还有以下单词也与hard-and-fast有关：solid（固体的）、stability（稳定性）、immovable（不可移动的）、impenetrable（不可穿透的）等。这些单词都与hard-and-fast的含义相近，都表示物体的坚固、稳固或不可动摇的性质。

常用短语：

1. hard-and-fast rule

2. hard-and-fast decision

3. hard-and-fast approach

4. hard-and-fast contract

5. hard-and-fast law

6. hard-and-fast rule of thumb

7. hard-and-fast commitment

例句：

1. We must abide by the hard-and-fast rule of never late for work.

2. He made a hard-and-fast decision to quit his job and start his own business.

3. We need to adopt a hard-and-fast approach to solving this problem.

4. The contract is a hard-and-fast commitment between both parties.

5. The law is a hard-and-fast rule that must be followed in all cases.

6. We should not rely on a hard-and-fast rule of thumb to judge others.

7. She has made a hard-and-fast commitment to help the homeless children in her community.

英文小作文：

Hard and Fast Rules in Life

Life can be challenging, but there are certain rules that we can follow to make it smoother and more effective. These rules are known as hard and fast rules, and they can help us navigate through life"s ups and downs with confidence and certainty.

One example of a hard and fast rule is never being late for work or any other appointment. This rule ensures that we maintain our credibility and trustworthiness, which are essential for success in life. Another example is setting boundaries with others, which is a hard and fast rule that helps us maintain our personal space and boundaries, preventing unnecessary conflicts and stress.

Adopting hard and fast rules in life can help us avoid making mistakes and regrets, while also providing us with a sense of security and stability. However, it"s important to remember that these rules should not be blindly followed without considering the context and situation at hand. Sometimes, flexibility and adaptability are necessary to handle unexpected situations effectively.

In conclusion, hard and fast rules can be helpful tools in life, but they should be used judiciously and with consideration for the circumstances at hand. By following these rules, we can navigate through life"s challenges with confidence and certainty, achieving our goals and dreams.