It'sensed a mineral called hematite that often forms under wet conditions.发现一种被称作赤铁矿的矿物质,一般是在湿润的环境下形成的.Iron ores of greatest economic interest contain magnetite and hematite.最具有经济价值的铁矿包括磁铁矿和赤铁矿.Prismatic crystals of...
昆虫发出的咔哒声实际上是铐手铐时发出的声音.The sound of insect clicks was the actual sound of handcuffs.听着火车轨道的咔哒声,他很快就进入了梦乡.He listened to the click of the rails and then fell fast asleep....