In such situations specific laboratory tests are necessary to establish the etiology.在此情况下,需要特异性实验来确定病原.Acute sinusitis is usually initiated by an acute respiratory tract infection of viral etiology.急性鼻窦炎常常是由病毒性病因的急性呼吸道感...
Yours truly was awoken by a shout: "Ahoy there!"鄙人被一声大喊惊醒：“喂！”The driver managed to escape from the vehicle and shout a warning.那名司机设法从车里逃了出来并大声警告别人。A small group of youths stayed behind to heckle and shout abuse.一小群小青年没...