hardjo哈尔乔型hardadj.硬的；困难的；棘手的；坚强的；残酷的；用力的；液态的；严寒的；确凿的adv.努力地；强烈地；严重地；坚定地hard self-excitation硬自发激励Hard-synchronization硬同步hard- melting metals难熔金属Hardwicke's forest bathard spectrum analysis铁谱分析hard-wire connection硬连线连接hard-and-fast rule硬性规则hard grown copper wire硬铜线Harder and Young ester哈-杨氏酯hard AI alloy material硬铝合金材料