焊接: weld; welding; soldering; seal; sealing; sealing-in; shutting together 短语和例子电弧焊接 (electric) arc welding; 焊接材料 welding material; 焊接操作 welding operation; 焊接车间 welding shop; 焊接点 point of weld
不可: 1.(不可以) cannot; should not; must not; not allowed; forbidden 短语和例子不可一概而论 must not make sweeping generalizations; 不可剥夺的权利 an inalienable right; 不可抗拒的历史潮流 an irresistible historical trend; 两