casual pulmonary infection

例句：

1. 1. He caught a cold from his neighbor's dog and developed a casual pulmonary infection.
   他从邻居的狗身上感染了感冒，并发展成了偶然的肺部感染。
2. 2. The patient was admitted to the hospital for treatment of a casual pulmonary infection.
   患者因偶然的肺部感染被收治入院治疗。
3. 3.Doctors recommend that people avoid close contact with people who have had a casual pulmonary infection.
   医生建议人们避免与那些有偶然肺部感染的人密切接触。