graafian的音標是[gr??fi?n]，翻譯成中文是格拉斐恩（人名）。

速記技巧是：可以嘗試使用諧音法進行記憶，gra-fa-rian可以諧音為“格法日燃”，這樣有助于快速記憶該單詞。

Graafian，也稱為Pearsonian，是一個表示一種類型的不完全平方數的術語，通常指形如2n+1的數。它的詞源可以追溯到數學家John Machin在1760年代的工作，他發現了一些與畢達哥拉斯定理相關的性質。

變化形式：單數形式為graafian number，復數形式為graafian terms。

相關單詞：

1. Pell"s equation：與graafian相關的概念，指一類非平凡的超越方程，形如x^2 - graafian^2 = 0。

2. Machin"s formula：約翰·梅欽的公式，用于計算graafian數。

3. square-free：非二次的，與graafian相關的概念，指不含有二次因子的數。

4. quadratic reciprocity：二次互反律，是數論中的一個定理，也與graafian相關。

5. diophantine equations：丟番圖方程，一種特殊的graafian方程，涉及到整數解。

6. incomplete square：非完全平方數，與graafian密切相關的概念。

7. Pell"s Pell numbers：佩爾數，一種特殊的graafian數。

8. quadratic congruence：二次同余，一種與graafian相關的數學概念。

9. binary quadratic forms：二元二次型，是一種與graafian密切相關的數學結構。

10. quartic equations：四次方程，是一種復雜的graafian方程類型。

常用短語：

1. grapevine 葡萄藤

2. grapevine report 風聞

3. grapevine rumour 謠言

4. grapevine warfare 流言蜚語

5. grapevine whisper 傳聞

6. grapevine gossip 閑話

7. grapevine tattler 傳聞者

雙語例句：

1. The grapevine is a beautiful vine that covers the wall with its leaves. (描述葡萄藤)

2. The grapevine rumour has been denied by the company. (談論流言)

3. She is a master of spreading grapevine gossip. (評價傳聞傳播者)

4. The grapevine whisper suggests that he may be offered a promotion soon. (討論傳聞)

5. Please stop spreading false grapevine reports about me. (請求停止傳播謠言)

6. The grapevine tattler is always busy with news about the latest celebrity scandals. (談論傳聞者的工作)

7. We need to stop using the grapevine as a source of information and rely on official channels instead. (呼吁使用官方渠道獲取信息)

英文小作文：

Title: The Power of the Grapevine

Grapevines have been a part of our lives for centuries, whether it"s the beautiful vine that covers a wall with its leaves, or the rumours and gossip that spread through social circles like wildfire. In today"s fast-paced world, we rely more than ever on technology to keep us informed, but there"s something about the old-fashioned way of passing along information that still has a place in our lives.

Grapevine gossip can be a source of entertainment, but it can also be harmful if it"s untrue or used in a malicious way. We need to be mindful of the impact our words have on others and refrain from spreading rumours and unfounded stories. At the same time, we shouldn"t underestimate the power of the grapevine to bring us closer together and create bonds of community and understanding. Through sharing stories and passing along information, we can build bridges of connection and understanding that technology alone cannot provide.

In conclusion, the grapevine may be an old-fashioned way of passing along information, but it still has a role to play in our lives. We should use it responsibly, taking into account its potential benefits and drawbacks, and embrace it as a way of staying connected with our friends and communities.