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...
The battle of Sevastopol was costly for both sides.塞瓦斯托波尔之战苏德两方付出了代价都是极高的.On May 9, 1944, Sevastopol was liberated from the Germans.1944年5月9日, 塞瓦斯托波尔从德国人手中被解放出来.In the south, the Germans captured Sevastopol.在南方, 德国人占领了塞瓦...
After the outstanding performance, all the audience are ardently clapping their hands, admiring and acclaiming us.经过突出的演出以后, 所有的听众都热烈地鼓掌, 赞美我们.He set himself ferociously tough standards; and he was ardently devoted to ba...