coalsack的音標為[?k??l?s?k] ，基本翻譯為“煤煙星云”，速記技巧為：該詞發(fā)音像“ coal 瞎說”。

Coalsack英文詞源可以追溯到古英語中的coal，意為煤或炭。sack在這里指的是形狀，引申為形狀像煤煙或煙圈的星云狀天體。

變化形式：復數(shù)形式為coalsacks，表示煤煙或煙圈的星云狀天體。

相關單詞：

Nebula：星云，指的是天體物理學中一類天體，形狀和大小與星團、星系相似。

Cloud：云，與coalsack的形狀相似，表示形狀像煙圈或煤煙的星云狀天體。

Nebulosity：名詞，表示星云狀的特性或性質(zhì)。

Coalescence：名詞和動詞，表示合并或聚集成團，可以指星云狀天體的聚集過程。

Coalescing：動詞，表示聚集或聚合成團。

Coalesced：形容詞和過去分詞，表示已經(jīng)聚合成團的狀態(tài)。

Coalescingly：副詞，表示聚集成團的方式或傾向。

Coalescence-like：形容詞，表示類似于星云合并的狀態(tài)或過程。

Coalsackian：形容詞，表示與coalsack相關的或具有相似特性的。

常用短語：

1. coal black

2. coal sack

3. coal-black hair

4. coal-black eyes

5. coal-black smoke

6. coal-black sky

7. coal-black mood

例句：

1. The coal-black hair of the girl shone in the sunlight.

2. The coal-black eyes of the young man were full of passion.

3. The coal-black smoke from the chimney mingled with the grey clouds in the sky.

4. The coal-black mood of the teacher made the classroom quiet and solemn.

5. The coal sack was a symbol of wealth and power in ancient China.

6. The coal sack is a beautiful and mysterious object that attracts many visitors.

7. I am feeling a bit like a coal sack today, feeling lost and confused.

英文小作文：

Coal Sack: Symbol of Mystery and Power

The coal sack, a mysterious object with a rich history and cultural connotation, has always attracted many visitors with its beauty and allure. It is said that the coal sack was once a symbol of wealth and power in ancient China, worn by noblemen and emperors to show their status and dignity. Today, however, the coal sack has become a symbol of art and culture, attracting people from all walks of life to come and admire it.

The coal sack is a beautiful piece of cloth with a dark color, resembling coal in appearance. It is often used to create artworks and decorations, which are both unique and attractive. When people see a coal sack, they are often filled with a sense of mystery and wonder, wanting to know more about its history and cultural background.

The coal sack is not only a symbol of art and culture, but also a reminder of our history and heritage. It reminds us that we should cherish our cultural traditions and values, while also embracing the changes that come with time and development. In this way, we can create a better future for ourselves and our descendants, while also preserving our cultural heritage for future generations.