translation.en: So we would remove the algaes that concentrated in the bottom of this column, and then we could harvest that by a procedure where you float the algae to the surface and can skim it off with a net.
translation.zh: 我们将把集中在底部的 藻类移走，我们就能按照程序 收获漂浮在表面的藻类 并有网子捞取。