而且所有声频均有指向性,声频愈高, 指向性愈强.The higher the acoustic frequency is, the stronger its directivity is.它表现在空间生产力发展的继承性 、 指向性 、 加速性和国际性四个方面.The inheritance that its performance grows in dimensional productivity, directivity, accel...
我们大步流星地穿过雪封的旷野。We strode across the snowy fields.旷野中的士兵遭到敌人炮火的攻击.The soldiers in the open field were exposed to the enemy's gunfire.那位飞行员终于把已损坏的飞机安全地降落在一片旷野上.The pilot was able to set the damaged plane down safely i...
Pleural effusion cytology was sent and showed suspicious for malignancy.胸膜渗出细胞学被送出和显示疑似为恶性肿瘤.Intrapleural streptokinase for pleural infection A step forward in managing pleural effusions?胸膜腔内滴注链激酶治疗胸膜腔感染这是胸膜腔积液治疗的进步 吗 ?C...