algous

例句：

1. 1. The algous in the ocean is a vital part of the ecosystem.
   海洋中的海藻是生态系统的重要组成部分。
2. 2. Algae are often used as a food source for humans and animals.
   海藻常被用作人类和动物的食物来源。
3. 3. The algaes in the water were so dense that it was hard to see through.
   水中的藻类如此密集，以至于难以透过去。