我们在珊瑚礁围成的泻湖里游泳，那里的水非常清澈。

We swam in the ___lagoon formed by coral reefs, where the water was crystal clear.

酒店花园有一个装饰性的环礁湖，四周环绕着色彩缤纷的花朵。

The hotel garden has a decorative ___lagoon surrounded by colorful flowers.