Spirillum

例句：

1. 1.Spirulina is a type of algae that can be used as a food source.
   螺旋藻是一种可以用来作为食物来源的海藻。
2. 2. Spirulina has been shown to have health benefits, such as boosting the immune system.
   研究表明螺旋藻具有增强免疫系统的好处。
3. 3. In aquaculture, Spirulina is often used as an additive to improve fish growth and health.
   在水产养殖中，螺旋藻常被用作添加剂，以促进鱼类生长和健康。