So the column actually had another very nice feature, and that is the algae settle in the column, and this allowed us to accumulate the algal biomass in a context where we could easily harvest it.
因此，这个圆柱体事实上有一个非常好的特征， 这是圆柱体里沉淀的水藻， 这样允许我们把藻类生物量 积累在一个容易收获的容器里。