A complex crystalline silicate containing aluminum, boron, and other elements, used in electronic instrumentation and, especially in its green, clear, and blue varieties, as a gemstone.

电气石一种复合晶体硅酸盐，含有铝、硼和其它元素，用于电子仪器制造，其绿色，透明及蓝色的变体可作为宝石。

youdao

Pure crystalline boron is a black, lustrous, very hard but brittle semiconductor that does not occur naturally.

纯晶态硼为黑色有光泽的半导体，硬度很高。

youdao

A light soft mineral consisting of hydrated sodium borate in crystalline form; an important source of boron.

一种轻软矿物，由含水硼酸钠组成，晶体状，是硼矿的主要来源。

youdao