1·What do the underlined words "cordierite, calcite or tourmaline" mean?
下划线的“堇青石、方解石或电气石”是什么？
2·The Polycrystalline structure and the phase composition of cordierite kiln furniture are deter-mined by means of X-ray and electron microscope.
利用X-射线衍射分析和电子显微镜分析的结果，确定堇青石窑具的多晶结构和各晶相的含量；
3·Taking cordierite and topaz for example, the specific cone-apex Angle values are given, and the reason why the cone-apex angles are too small is analyzed.
并以堇青石和黄玉为例给出了具体的锥顶角数值大小，分析了锥顶角很小的原因。
4·The staurolite schist and cordierite schist have been discovered in northern Xiangshan area for the first time.
在相山北部首次发现十字石片岩及堇青石片岩。