When his master's off traveling, Caleb stays with Pierre's parents.凯莱布在主人外出旅行时与皮埃尔的父母住在一起。We have a beautiful city and we pray it stays that way.我们的城市很美丽，但愿它能保持下去。She always stays cool, calm and collected in a ...
通过试验研究了焊条药皮碱度对熔敷金属脱硫脱磷行为的影响.Effect of basicity of electrode coating on desulphidation and dephosphorization is studied.耐火材料的脱磷作用有利于提高钢水及钢材质量.Eliminating phosphorus from the fireproof material will improve the quality of ...