horizon前景；视界，水平(线);一种计算机(“北极星”计算机)详细»
horizon水平(线)，地平(线)，视平线，视界，范围水平线地平线，详细»
地平线geographic horizon;ground line;horizon line;horizontal line;skyline详细»
地平线geographic horizon;ground line;horizon line;sky line;skyline;treeestrial horizon详细»
地平线groundline;horizon;skyline详细»
地平线apparent horizon;geographic horizon;ground parallel;natural skyline详细»