critical carbon content(carbon content at critical point: Below a critical carbon content the rate of mass transfer is insufficient to react with all the injected oxygen. 低于临界含碳量时，传质速度不足以维持与喷人的全部氧进行反应。)
carbon content at critical point(【技】在钢水冶炼过程中，当钢水含碳量较高时，脱碳速率的主导限制因素是氧的传质速率；随着脱碳反应的进行，钢水中含碳量降低到一定的浓度值后，脱碳速率的主导限制因素由氧的传质速率转变为碳的传质速率，脱碳速率出现明显下降，此时的碳含量称之为临界含碳量。: As seen in part (b) of Figure 9, the carbon content at the critical point is about 0. 688 weight percent and the mean value of the decarburization rate is about 0. 102 weight percent/minute, with standard deviations of 0. 11 and 0.01, respectively. 如图 9(b) 所示，临界点含碳量约为 0.688 质量分数，脱碳速度平均值约为 0.102 质量分数/ min, 标准偏差分别为 0.11和 0.01。)
critical casting speed(Further simulations were performed by them to predict this critical casting speed as a function of section size and working mold length (distance from meniscus to mold exit). 为了预测作为断面尺寸和结晶器工作长度(金属弯月面至结晶器出口的距离)函数的临界拉坯速度，他们进行了进一步的模拟。)
