cavern的音標為[?k?v?n] ，基本翻譯為“洞穴；地洞；大窟窿”。速記技巧可以使用諧音記憶法，將其記為“卡屋人”，即卡在屋子里的人。

Cavern這個詞的詞源可以追溯到拉丁語中的“caverna”，意為洞穴或洞室。它的變化形式包括其復數形式“caverna”和過去式“cavernt”以及過去分詞“cavernd”。

相關單詞：

Cavernous：這個詞用來形容洞穴般的，通常用來描述物體或空間非常寬大或空曠。

Caverns with：這個詞組表示與洞穴有關的，比如與洞穴相關的物品或行為。

Cavernous caves：可以表示洞穴狀的洞穴，也可以指代具有洞穴特征的地方。

以上這些單詞都與Cavern這個詞有著密切的聯系，并且可以用來描述與洞穴相關的各種事物。Cavern這個詞在英語中也被廣泛用于描述地下洞穴或深處的空間，具有很強的形象性和描繪性。

常用短語：

1. cavernous room

2. dark cavern

3. underground cavern

4. mysterious cavern

5. vast cavern

6. hidden cavern

7. vast underground cavern

例句：

1. The cavern was filled with bats and the air was thick with their wings.

2. We explored the dark cavern and found a treasure hidden in its depths.

3. The vast underground cavern was filled with ancient artifacts that had been lost for centuries.

4. The vast cavern was a perfect place for a secret meeting, with no one around to disturb us.

5. The mysterious cavern was full of ancient carvings that had been left untouched for years.

6. The entrance to the cavern was lost in the mist, making it even more alluring.

7. The air in the cavern was cool and fresh, a perfect place to relax and unwind.

英文小作文：

標題：Underground Caverns - Mystical Spaces of Mystery

Underground caverns are mysterious places that hold secrets from the past that have been lost to time. These vast underground spaces are often filled with ancient artifacts and mysterious carvings that tell stories of long-forgotten civilizations.

Visiting a cave can be an adventure, filled with excitement and wonder as you explore its depths and discover new wonders hidden within its walls. These caverns can also be a place of peace and tranquility, where you can relax and unwind in the cool and fresh air of the underground world.

Moreover, underground caverns can be a perfect place for a secret meeting, with no one around to disturb you. They offer a safe and secure environment that is difficult to detect, making it an ideal place for confidential discussions and planning.

However, these caverns are also dangerous places, filled with hidden dangers that can pose a threat to those who venture into them without proper preparation and safety measures. Therefore, it is essential to be aware of these dangers and take all necessary precautions before entering any underground cave.