Oysters were seeded on the piers and ever since, their concretions have helped cement the granite blocks together.

在桥墩上进行牡蛎育种之后，利用它们的凝固物可岗岩胶合凝起来。

Another weed, known by the name velp and boasting four-foot leaves, was crammed into the coral concretions and carpeted the ocean floor.

另外一种海草，名为维培菜，叶长四英尺，胶在珊瑚的分泌物中，像地毯一样铺在海底下面。