壳一般的

例句：

1. 1. The shell of the turtle is a protective covering.
   乌龟的壳是一种保护性的覆盖物。
2. 2. The oyster is a popular seafood dish in many countries.
   牡蛎是许多国家受欢迎的海鲜菜肴。
3. 3. The clams were washed and then boiled in salt water.
   蛤蜊被洗净，然后放在盐水中煮。