fiftieth的音標是[?fif?θ??θ]，基本翻譯是第五十，速記技巧可以是諧音記憶，即“費飛石猴”。

fiftieth這個詞的詞源可以追溯到拉丁語詞fiftius，意為“第五十的”。它的變化形式主要有復數形式fiftieths，比較級形式fiftiethly，以及最高級形式fiftiethest。

相關單詞：

1. fifth（第五的）：這個詞與fiftieth中的th發音相同，因此可以很容易地聯想到fiftieth。

2. fiftieth（第五十的）：這是fiftieth的直接形式，表示一個數字或位置的第五十個。

3. fifty（五十的）：這個詞是最常見的形式，經常與fiftieth一起使用，表示一個數量或比例的五十。

4. fifty-first（第五十一的）：這是fifth的下一個數字，與fiftieth相對應。

5. fifty-fifth（第五十五的）：這是fifth的下一個數字，與fiftieth相對應，但順序不同。

這些單詞都是基于fiftieth這個詞源變化而來的，它們在英語中都有廣泛的使用和意義。fiftieth這個詞在表示一個數量或比例的五十時，經常與數量或數字的其他形式一起使用，例如“fifty percent”（百分之五十）或“fifty-fifth grade”（五年級）。此外，它還可以用來表示一個位置或順序的第五十個，例如“the fiftieth floor”（第五十層）。這些用法使得fiftieth這個詞在英語中具有廣泛的應用和重要性。

常用短語：

1. fiftyth anniversary

2. on the fiftyth try

3. fifty-fifty chance

4. fifty-fifty split

5. at the fifty-yard line

6. fifty cents (in) worth

7. fifty-fifty split of the profits

例句：

1. We celebrated our fiftyth wedding anniversary last year.

2. After trying again and again, she finally got the job on the fifty-fifth try.

3. There"s a fifty-fifty chance that we"ll have rain tomorrow.

4. They split the money evenly at the fifty-yard line.

5. We"re at the fifty-yard line of our career, what should we do next?

6. The company"s profits were split evenly between the partners, with each receiving a fifty-fifty split.

英文小作文：

The Fiftieth Anniversary of My Parent"s Wedding Day

Today, I was invited to attend my parents" wedding anniversary celebration, which was held at their favorite restaurant. It was their fiftieth wedding anniversary, and I couldn"t help but feel moved by their story of love and commitment over the years.

My parents met each other in their early twenties and fell in love quickly. They had their share of ups and downs, but they always managed to come out stronger than before. They have been together for half a century now, and I am proud to call them my parents.

Looking back on their relationship, I realize that commitment and love are not just words, but actions that shape a lifetime of happiness and joy. I hope to follow in their footsteps and find my own partner who will love me unconditionally and be there for me through thick and thin.

I am reminded of the saying that "time heals all wounds," and I believe that my parents" love story is a testament to this truth. May their love story continue to inspire others for many more decades to come.