The colorful effect is due to the diatom's silicacell wall, which encases the organism like a glassy shell.
它的五颜六色效果是由于硅藻的像玻璃外壳包围着机体的二氧化硅细胞壁。
2
Diatoms already secrete silica by exocytosis-a biological process by which cells direct secreted material outside the cell walls.
硅藻已经通过胞外分泌二氧化硅，这是细胞直接把物质分泌出细胞壁的一个生物过程。
3
Any of various microscopicone-celled or colonial algae of the class bacillariophyceae having cell walls of silica consisting of two interlocking symmetrical valves.