But a new hydrate mineral has now entered the picture : hydrated silica , commonly known as opal .

但是，现在一种新的水合矿物进入了视野：水合二氧化硅，俗称蛋白石。

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。

The colorful effect is due to the diatom 's silica cell 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。

Waelz slag , to give its technical name , is composed mainly of silica but is also undesirably rich in poisonous metals like lead and zinc .

其学名称为waelz渣，主要由二氧化硅组成，但因同时含有丰富的诸如铅、锌等有毒金属而不受人欢迎。

The fluid that armour holdings developed is a liquid polymer containing nano-engineered particles of silica , though bae is coy about the details of what it is using .

虽然英国宇航公司不肯明说它所使用液体的细节，但装甲控股公司曾经研制的液体是一种含有二氧化硅纳米颗粒的液态聚合物。