sputum examination

例句：

1. 1. The doctor ordered a sputum examination to rule out any lung infections.
   医生要求进行痰液检查，以排除任何肺部感染。
2. 2.During the examination, the patient was asked to cough up some sputum for analysis.
   在检查过程中，患者被要求咳出一些痰液进行分析。
3. 3.Sputum examination is an important tool in diagnosing respiratory diseases.
   痰液检查是诊断呼吸系统疾病的重要工具。