Cambridge greensand

例句：

1. 1. The Cambridge green sand beach is a popular tourist destination.
   剑桥绿沙滩是一处受欢迎的旅游胜地。
2. 2. The sandy beach is covered with green seaweed, making it a unique sight.
   沙滩上覆盖着绿色的海藻，使其成为一道独特的风景。
3. 3. The green sand has been collected from the nearby riverbed for use in construction projects.
   这些绿色沙子是从附近的河床收集来的，用于建筑项目。