1·In humans, coronaviruses cause respiratory tract infections.
冠状病毒在人体内会引起呼吸道感染疾病。
2·Tuberculosis is respiratory tract contagion.
肺结核是呼吸道传染病。
3·A non-productive cough does not expel sputum from the respiratory tract.
干咳指不从呼吸道排出痰液的咳嗽。
4·His cough was caused by an infection of the upper respiratory tract.
他的咳嗽是由上呼吸道感染导发的。
5·The secretory system of the respiratory tract is probably the most appreciated.
呼吸道的分泌系统可能是最先被意识到的。
6·An upper respiratory tract infection may precede all other symptoms in as many as 68.8% of patients.
l 68.8%的患者在所有症状之前有上呼吸道感染。
7·One feature seen in many patients is the development of lower respiratory tract early in the illness.
在许多患者身上观察到的一项特征是，疾病初期会出现下呼吸道症状。
8·Radon can cause lung cancer, leukemia, albinism and other pathological changes in respiratory tract.
氡气会导致肺癌、白血病、皮肤癌及其它呼吸道病变的产生。
9·Adenovirus-36 (Ad-36) is a highly contagious virus that normally causes upper respiratory tract infections.
腺病毒—36 (Ad - 36)，通常会导致上呼吸道感染，一种高度传染性的病毒，大约有50多种变异体。
10·The H5N1 virus tends to infect the lower respiratory tract in humans, where it can't easily get out and spread.
而H5N1病毒倾向于感染人的下呼吸道，从这里病毒很难传播出去感染其他人。
1·After his daughter found him and called an ambulance the old man died "because of a respiratory tract clogged by a nosebleed".
他女儿发现了之后赶紧叫了救护车，但是这位老人仍然因为鼻血堵塞呼吸道而窒息去世。
2·After his daughter found him and called an ambulance, the old man died "because of a respiratory tract clogged by a nosebleed".
他女儿发现了之后赶紧叫了救护车，但是这位老人仍然因为鼻血堵塞呼吸道而窒息去世。
3·After all, flu viruses work this way; they destroy the cells of our respiratory tract, wreaking havoc in our airways.
毕竟，流感病毒就是这样的，它们破坏我们呼吸道的细胞，扰乱我们的通气孔。
4·His report found that there was no evidence of heat injury to the dog's respiratory tract. No mouth or foot abrasions were found, indicating the dog did not try to escape.
兽医的验尸报告显示，在这只狗的呼吸道内没有热伤的证据，另外也没有在狗的嘴部和足部发现损伤，这表明当时这只狗并没有做无谓的反抗，或试图逃脱。
5·Programme has shown a reduction of almost 20% in antibiotic usage for respiratory tract infections at a community level.
规划使社区级用于呼吸道感染的抗生素减少了近20%。