falloff的音標是[?f??l??f]，基本翻譯是減少；衰退；減少量，速記技巧是fall（落下）+ off（離開）→落下后離開原來的位置→減少。

"Falloff"這個詞的英文詞源可以追溯到拉丁語"fallere"（意為“欺騙”或“失敗”），通過詞根"fall"（意為“落下”或“跌落”）演變而來。它的主要變化形式是名詞形式"falloff"，表示下降、減少或衰退的程度。

相關單詞：

1. "decline"：源自拉丁語"declinare"（意為“傾斜”或“下降”），表示下降、衰退或衰落的狀態。

2. "reduction"：源自拉丁語"redux"（意為“減少”或“回收”），表示減少的數量或規模。

3. "decrease"：直接源自拉丁語"decrex"（意為“減少”），表示數量或程度的減少。

4. "drop"：源自古英語"droppa"，意為“落下”，也可表示數量或程度的減少。

5. "wane"：源自拉丁語"wanus"（意為“月亮的盈虧”），表示逐漸減弱或衰退。

6. "ebb"：源自古英語"ebba"，意為“退潮”，也可表示數量或力量的減少。

7. "slump"：源自英語俚語"slump down"，意為“突然下降”，也可表示經濟衰退或市場疲軟。

8. "reductionism"：源自拉丁語和法語，表示對事物的簡化或減少，常用于社會科學領域。

9. "fallout"：源自英語俚語，表示后果、影響或結果，也可指核爆炸的后果。

10. "fallacy"：源自希臘語，意為“錯誤”，常用于指代邏輯上的錯誤或推理上的不準確。

以上這些單詞都與"falloff"有著密切的聯系，它們都表示數量、程度或狀態的減少或衰退。這些單詞在英語中廣泛使用，并具有豐富的含義和用法。

常用短語：

1. fall off a cliff

2. fall off a cliff into the abyss

3. fall off the edge of the world

4. fall into a decline

5. fall into disuse

6. fall into disrepair

7. fall out of fashion

例句：

1. The company has fallen off a cliff after the economic crisis.

2. The once prosperous town has fallen into decline.

3. The once popular book has now fallen out of fashion.

4. The once busy street has now fallen into disuse.

5. The once beautiful garden has now fallen into disrepair.

6. His reputation has fallen off a cliff after he was caught cheating on exams.

7. The fashion industry is constantly changing, and some trends fall off a cliff quickly.

英文小作文：

The Fall of an Iconic Building

Once upon a time, there was a beautiful and iconic building in the city center that was a symbol of its history and culture. It was a landmark that everyone knew and loved, but now it has fallen into disrepair and is slowly disappearing from the city skyline.

The building was once a center of activity, with shops, restaurants, and offices all around it, but now it stands empty and neglected, with only the rusting iron gates and peeling paint to remind us of its former glory. It"s a sad sight to see, especially when you consider how much it means to the city"s history and culture.

The reasons for its fall are many, but mainly due to neglect and lack of maintenance. The building was once a center of activity, but now it"s been left to decay and decay faster with each passing day. It"s a reminder of how important it is to maintain our heritage and history, so that future generations can appreciate them too.