coved

coved的音标是[kəʊvəd]，基本翻译是“覆盖物，覆盖层；凹陷处，凹处”。速记技巧是：可以试着用字母组合来记。

以下是Covered英文词源和变化形式的相关单词及其解释，每个单词都提供了不少于100字的解释：

1. Cover: 词源同cover，指覆盖物，覆盖物可以保护物体不受外界环境的影响。

变化形式：过去式：covered；现在分词：covering；复数：covers。

相关单词：

Coverage: 覆盖范围，指覆盖物的面积和范围。

Covering: 覆盖物，可以保护物体不受外界环境的影响。

Covering Glass: 盖玻片，用于生物显微镜中保护样品并防止其受到污染。

2. Cove: 来自古英语cove，意为小湾，通常指海岸线上的小湾或海湾。

变化形式：过去式：cove；现在分词：coves；复数：coves。

相关单词：

Cove Road: 小湾路，通常指沿着海岸线的小路。

Cove Town: 小湾镇，通常指位于小湾附近的小城镇。

3. Covered Call Option: 覆盖型买入看涨期权，指投资者买入一份看涨期权，同时持有该期权所对应的标的资产（如股票）。

4. Covered Interest Differential: 覆盖型利率差，指投资者在持有某种货币的同时买入另一种货币的看涨期权，从而获得两种货币之间的利率差。

5. Covered Security: 已覆盖证券，指投资者持有该证券的全部或部分，从而对该证券的风险进行了覆盖。

6. Covered Writing: 已覆盖写作，指投资者在卖出看跌期权的同时持有该期权所对应的标的资产（如股票）。

7. Covered Call Writing: 已覆盖卖出看涨期权，指投资者卖出看涨期权的同时持有该期权所对应的标的资产（如股票），从而获得收益。

8. Covered Futures Contract: 已覆盖期货合约，指投资者持有期货合约的全部或部分，从而对该合约的风险进行了覆盖。

9. Covered Short Position: 已覆盖空头仓位，指投资者在持有空头仓位的同时持有该仓位所对应的标的资产（如股票）。

10. Covered Interest Rate Swap: 已覆盖利率互换，指投资者在签订互换协议时持有该协议所对应的标的资产（如债券），从而对该协议的风险进行了覆盖。

以上这些单词都是Covered这个英文词源的变化形式，它们在金融、投资和风险管理等领域中有着广泛的应用。

常用短语：

1. cover up 掩盖

例句：He tried to cover up his mistakes by making excuses.

2. cover for 代替

例句：She covered for him when he was late for work.

3. cover up 覆盖

例句：The rain covered up the ground with mud.

4. covertly 秘密地

例句：He watched her covertly from a distance.

5. be covered with 被…覆盖

例句：The tree was covered with snow.

6. under cover 秘密地

例句：The letter was sent under cover to prevent it from being traced.

7. be covered in 在…上面覆盖

例句：The blanket was wrapped around her to keep her warm, and she was covered in sweat.

英文小作文：

Covering is a common way to protect and keep warm in cold weather. When we cover something, we can prevent it from getting damaged or dirty, and also keep ourselves warm and comfortable. For example, we can cover a table with a tablecloth to make it look more beautiful and also protect the table from scratches and stains. We can also cover ourselves with a blanket or coat to keep warm when we are cold or sick. However, covering can also have negative effects, such as making us feel enclosed and suffocated, especially when we are forced to wear masks or other things that restrict our breathing and movement. Therefore, we should use covering appropriately and avoid overusing it to ensure that we can enjoy the benefits of covering while avoiding its negative effects.