a tough nut

a tough nut的音标是[ə] [tjuː] [nʊt]。基本翻译是“一个坚硬的坚果”。速记技巧是记住单词的发音和字母组合。同时，可以联想其他坚果相关的词汇，如peanut(花生)、nutshell(坚果壳)等。

"Tough nut" 这个词的英文词源可以追溯到古英语中的 "nut"（坚果）和 "tough"（坚硬的）。这个词组表示非常坚硬、难以打开或破坏的坚果。

变化形式：在英语中，"nut" 可以变为名词 "nutshell"（坚果壳）或 "nutcracker"（坚果夹）。

相关单词：

1. "Nutcracker"：这是一个常见的英语单词，指的是用于打开坚果的工具。它也用来形容那些非常强硬或难以对付的人或事物。

2. "Nutmeg"：这是另一种坚果，也是 "nut" 的一种变化形式。它通常用来形容那些非常聪明或机密的人或事物。

3. "Nutrient"：营养物质，来源于 "nut"（营养）和 "ing"（后缀，表示某种行为或状态）。

4. "Nutrition"：营养学，指的是研究食物和营养的科学。

5. "Nutritional"：营养的，来源于 "nutrition"（营养学）和形容词后缀 "-al"。

6. "Hard nut"：一个非常难对付的人或事物，来源于 "tough nut"。

7. "Hard shell"：坚硬的外壳，来源于 "hard"（坚硬的）和 "shell"（外壳）。

8. "Soft nut"：一个容易对付的人或事物，与 "tough nut" 相反。

9. "Crack"：裂开或破裂，来源于 "crack"（裂缝）和动词词尾 "-k"。

10. "Crack nut"：一个容易破裂的人或事物，与 "tough nut" 相反。

以上这些单词都与 "nut" 这个词源有关，描述了不同类型的人或事物的特征。

常用短语：

1. a tough nut to crack

2. as tough as nails

3. a tough nut to crack (比喻) 难啃的硬骨头

4. tough nut to crack (比喻) 难以解决的问题

5. tough as a nut

6. tough as a nutshell

7. a nut to crack

例句：

1. He is a tough nut to work with, always challenging my ideas.

2. She is as tough as nails and always gets the job done.

3. We have a tough nut to crack before we can call this project finished.

4. He is a tough nut to deal with, always making you feel uncomfortable.

5. She is a nut to crack when it comes to her work, always putting in the extra effort.

英文小作文：

Life can be a challenge sometimes, especially when you have to deal with difficult situations that seem impossible to crack. But I believe that we can overcome any challenge if we are willing to put in the effort and persevere until we succeed.

Whether it"s a tough job, a challenging relationship, or a difficult personal situation, we need to approach it with courage and determination. We need to be willing to work hard, learn from our mistakes, and keep pushing forward until we reach our goals.

Sometimes we will fail, but that"s okay. Failure is just another opportunity to learn and grow, and it"s never the end of the world. We need to keep in mind that success is not always easy, but it"s always worth the effort. So, let"s embrace the challenges that life throws at us and rise to the challenge with courage and determination.