例如木材灰、可呼吸性二氧化矽和铍为最近被提出具较低阈值的例子。

Examples where lower limit values have recently been proposed include wood dust, respirable silica, and beryllium.

youdao

薄膜先以微影及蚀刻制程制作出金属线路，线路之间则填入二氧化矽。

The lithographic and etching process for a membrane creates a mesh of metal wires with silicon dioxide filling the space between them.

youdao

其他成分：明胶(胶囊)，双磷酸钙，微晶纤维素，胶体二氧化矽和硬脂酸镁。

Other Ingredients: gelatin (capsule), dibasic calcium phosphate, microcrystalline cellulose, colloidal silicon dioxide, and magnesium stearate.

youdao