“冶金”的英语？

“冶金”的拼音为：yě jīn...

他由学物理改为学冶金是正确的 吗 ?Was he right to change from Physics to Metallurgy?冶金工业也有同样的趋向.The same trend has taken place in the smelter field.他们指出了把冶金工业采用的断裂标准应用于增强塑料的不适合性.They point out inadequacies in applying criteria developed...