好斗行为是情感苦闷的一种表现。Aggressive behaviour is a sign of emotional distress.她仰起苦闷的脸，乞求帮助。She raised her stricken face and begged for help.她的亲吻扫除了他精神上的苦闷.His spiritual depression came to an end when she kissed him....
这钻机有变速控制。The drill has variable speed control.他发明了新的钻机之后, 许多荣耀都加在他的身上了.After he invented the new drilling machine, honors were thrust upon him.这种钻机的位置是锚定的.The rig is moored in position....