Westward , the wiry boughs of the bare thorn hedge which formed the boundary of the field rose against the pale opalescence of the lower sky 在西边，光秃秃的棘树的枝条像铁丝一样，结成树篱，形成一块块田地的边界，在低矮的灰白天色里十分显眼。
2.
These flashes of color are referred to as " fire " . " opalescence " is the term that was coined to describe this phenomenon . thid unique visual display makes the opal one of the most sought after gemstones in the world 蛋白石多数产在澳大利亚，这种宝石的色彩如火焰般游弋，极为独特，被称作将"红宝石的火紫水晶的亮紫绿宝石的海绿"融为一体。
3.
Each different wave length of the defraction results in assorted iridescent flashes of green , blue , aqua , yellow or red colors . these flashes of color are referred to as " fire " . " opalescence " is the term that was coined to describe this phenomenon 蛋白石多数产在澳大利亚，这种宝石的色彩如火焰般游弋，极为独特，被称作将"红宝石的火、紫水晶的亮紫、绿宝石的海绿"融为一体。
