The eddy chosen for that experiment lacked enough silicon to prompt these particular diatoms to grow .
为那个实验选定的涡流缺乏充足的硅素，促进这些独特的硅藻生长。
A slow moving river current can create a slow turning eddy , which rotates , forming an ice disc .
一条缓慢流淌的河水可以形成慢速的涡流，伴随着旋转，就会形成了一个冰盘。
Very slowly the edges are ground down until a gap is formed between the eddy and the surrounding ice .
慢慢的边缘开始结冰直到涡流和边上形成的冰有空隙为止。
Such swirling currents can be remarkably self-contained . In fact , the new research to be published in nature on july 19 shows that less than 10 percent of the eddy 's waters mixed with the surrounding ocean .
事实上，7月19日，《自然》上一篇最新报道说只有不到10%的涡流水域会与周边水域混合。
With such ideal conditions , the group dissolved seven metric tons of iron sulfate in acidic seawater and spewed the solution into the ship 's propeller wash starting on february 13 , 2004 , covering a circular patch in the eddy of some 167 square kilometers .
