海边的岩石上长满了绿色的海藻。

The rocks by the shore were covered in green ___seaweed.

这道汤用干海带调味，味道浓郁。

The soup is flavored with dried ___seaweed, giving it a rich taste.

海藻是花园里很好的天然肥料。

___Seaweed makes an excellent natural fertilizer for gardens.