They kept their dignity by retreating behind an unreasoning authoritarian.他们以无理的权威气派为屏障,可以保持自己的威严.At this moment of success I found only an unreasoning sense of futility.在这一成功的时刻我只感到一阵莫名的枉然。At this moment of success I fo...
绝大多数种类以吃螺为生。Most species live off aquatic snails.它展现了螺杆泵采油系统在高粘稠油和出砂井等方面良好的应用前景。It shows good application future in high viscid oil wells and sand product.涡轮喷气发动机和涡轮螺桨发动机更适用于飞机.The turbojet and the turboprop are much mor...