coals的音標是[?k??lz]。基本翻譯是“煤；煤炭”。速記技巧是注意不要和“cats”混淆。

“coal”這個詞的詞源可以追溯到拉丁語“coalex”，意為“煤炭”。它的變化形式包括過去式“coalfed”，過去分詞“coalited”和現在分詞“coaliting”等。

相關單詞：

1. Coal mine（煤礦）：這個詞是由“coal”和“mine”組成的，表示開采煤炭的地方。

2. Coal bed methane（煤層氣）：這是一種存在于煤炭層中的天然氣，也被稱為“coal gas”。

3. Coal seam（煤層）：這是煤炭層表面暴露的部分，通常由煤炭和巖石組成。

4. Coal tar（煤焦油）：這是從煤炭焦化過程中產生的液體產物，具有多種用途。

5. Coal-fired（燃煤的）：這是一個形容詞，表示使用煤炭作為燃料的。

6. Coal-to-liquor（煤炭液化）：這是一種將煤炭轉化為液態燃料的嘗試，但目前尚未廣泛應用。

7. Coal-bed de-watering（煤層疏干）：這是一種減少煤層水量的技術，有助于提高煤炭開采效率。

8. Coal-to-energy（煤能轉換）：這是一種將煤炭轉化為能源的過程，包括燃燒、發電等。

9. Coal-fired power plant（燃煤發電廠）：這是使用燃煤來產生電力的設施。

10. Coal ash（煤灰）：這是燃煤產生的固體廢物，需要妥善處理以防止環境污染。

以上這些相關單詞都與“coal”這個詞有關，涵蓋了煤炭的開采、加工、利用和廢物處理等多個方面。

常用短語：

1. coal mining

2. coal-fired power plant

3. coal bed methane

4. coal ash

5. coal tar

6. coal mining accident

7. coal-to-liquids

例句：

1. Coal mining is a dangerous job that requires safety equipment.

2. The coal-fired power plant emitted a lot of smoke and smelled terrible.

3. The coal bed methane is a clean energy resource that can be used to generate electricity.

4. The coal ash from the power plant is a byproduct that needs to be properly disposed of.

5. The spill of coal tar caused a environmental disaster that took years to clean up.

6. The coal mining accident killed several miners and caused widespread damage.

7. The technology of converting coal to liquids is a promising way to reduce carbon emissions.

英文小作文：

Coal is an essential resource that has powered the industrial revolution and continues to play a vital role in modern society. However, coal mining and its associated industries also pose significant environmental and safety challenges. From coal mining accidents to coal ash disposal, the impact of coal use cannot be ignored. At the same time, innovative technologies such as coal-to-liquids are showing promise for reducing carbon emissions and paving the way for a greener future. Despite its challenges, coal remains an essential part of our energy mix and will continue to play a role in the development of our planet.