nemecite

例句：

1. 1.The nemecite crystals were found in the laboratory.
   实验室里发现了这种结晶。
2. 2. The nemecite crystals were used to make electronic devices.
   这种结晶被用来制造电子设备。
3. 3. The nemecite crystals were used as a catalyst in the chemical reaction.
   这种结晶作为催化剂在化学反应中被使用。