critical ray临界光线criticaladj.批评的；挑剔的；决定性的；危险的adj.临界的critical ambient temperature临界环境温度critical rate of application临界供给强度critical solidification rate临界凝固速度critical back pressure ratio临界背压比critical speed of revolution临芥转速critical thinking questioned批判质疑critical angle refractometer临界角折射计Critical Technical Parameter关键技术参数critical phase transition pH临界相变pHcritical radius of a cluster群集体的临界半径

1. The construction of edge covered critical graphs is an important problem in the edge cover-coloring of graphs.
   摘要在图的边覆盖染色中边覆盖临界图的构造问题一直是研究的热点和难题。