coast的音標是[?k??st]。基本意思是“岸，濱”，通常指海、河等的邊緣。速記技巧是：注意字母o和s的發音。o通常發/??/，s通常發/s/。當s位于詞首或詞中，且前面元音發音時值較長或重讀時，s一般也發/?/。記住這個發音規律，就能更快速地記住單詞的拼寫。

coast的英文詞源：

coast這個詞源自于古英語，其詞根可以追溯到古日耳曼語中的“kost”，意為“海岸”。

變化形式：

coast作為名詞時，其復數形式為“coasts”，形容詞形式為“coastal”。

相關單詞：

1. coastline：海岸線，表示海岸的長度和寬度。

2. beach：海灘，指的是靠近海岸的沙灘。

3. seacoast：海濱，指的是靠近海洋的地方。

4. coastal：沿海的，表示與海岸相關的。

5. costal：同上，表示與海岸相關的形容詞。

6. coastalguard：海岸警衛隊，負責保護海岸線和防止非法捕魚等行為。

7. coastalzone：海岸帶，指的是海洋和陸地之間的交界區域。

8. coastalengineering：海岸工程學，指的是研究海岸地形變化和海平面上升等問題的學科。

9. coastalreservoir：海岸水庫，指的是在海岸線附近修建的水庫，用于調節水資源。

10. coastalprotection：海岸保護，指的是通過修建堤壩等方式來保護海岸線的措施。

以上這些單詞都與coast有著密切的聯系，反映了其作為海岸相關詞匯的含義和用法。

常用短語：

1. on the coast

2. by the coast

3. along the coast

4. off the coast

5. in the coastal area

6. coastal town

7. coastal environment

例句：

1. We can see the ocean on the coast from here.

2. She likes to walk along the coast on Sundays.

3. The ship was lost off the coast of Africa.

4. The coastal area is rich in natural resources.

5. The coastal town is famous for its beautiful beaches.

6. The destruction of the coastal environment is a serious problem.

7. We must protect the coastline from further erosion.

英文小作文：

Coastal Life

Living by the coast is a unique experience, with its beautiful beaches, clear waters and unique marine life. People in coastal towns and villages enjoy a relaxed and leisurely lifestyle, with plenty of time to enjoy the sea, sunshine and nature. From fishing to beachcombing, there is always something to do along the coast.

However, the coastal environment is also under threat from human activities, such as pollution, development and climate change. We must protect our coastline and marine life to ensure that future generations can also enjoy this wonderful natural resource. With proper conservation measures in place, the coastal environment can be preserved for future generations to enjoy and explore.