Butterfat 的音標為["b?t?fe?t]，基本翻譯為“黃油脂肪”。

速記技巧：可以將單詞拆分記憶，butter（黃油）和fat（脂肪）結合記憶。

Butterfat這個詞源于英語，它的詞源可以追溯到古英語，意為“黃油脂肪”。這個詞在英語中經歷了許多變化形式。它的詞形變化主要取決于詞性變化，例如在名詞形式下，它可以變為buttered（被涂黃油的）、butterfatty（黃油多的）等。在形容詞形式下，它變為buttery（黃油味的）或butter-like（黃油般的）。

相關單詞方面，因為butterfat主要與黃油有關，所以我們可以想到許多與黃油相關的單詞，例如butterfly（蝴蝶，因為蝴蝶翅膀上有黃油的形狀），buttercup（黃蝴蝶花，因其顏色和形狀與黃油相似），以及buttermilk（乳酪，因為乳酪的制作過程中會加入酪乳，即未加工的buttermilk）。此外，butterfat還可以與其他的食品詞匯相關聯，例如croquettes（油炸食品，通常在制作過程中會涂抹butterfat）和pattypan（一種蔬菜，因其形狀類似于butterpan（黃油罐）。

總的來說，Butterfat的詞源和變化形式展示了英語中食物詞匯的豐富性和多樣性。它不僅反映了人類飲食的歷史和文化，也為我們提供了學習和研究英語詞匯的有趣視角。

常用短語：

1. butter up

2. butterfly effect

3. buttered nook

4. buttered side up

5. buttered toast

6. buttered muffin

7. buttered bun

例句：

1. Please butter up the bread for me, I"m starving.

2. The butterfly effect can have huge consequences for the future.

3. I always butter my nook with jam, it"s delicious.

4. My mom always buttered my toast with extra butter, it was so tasty.

5. I had a buttered muffin for breakfast this morning, it was really good.

6. I love to eat buttered buns with a cup of coffee in the morning.

英文小作文：

Today I had a delicious breakfast of buttered buns with coffee. The soft, fluffy buns were perfectly paired with the creamy butter and the aroma of coffee filled the room. It was such a pleasant start to the day and I can"t wait to try something similar for lunch. Butter is such a versatile ingredient, it can be paired with so many different foods to create delicious dishes. I hope to have more opportunities to try new combinations of butter and other ingredients in the future.