n.痰，吐出物；吐痰，咳痰

He hacked up a large clot of phlegm from his chest.
他用力咳出一大块痰。
The patient was asked to spit out the expectorant after gargling with salt water.
医生让病人用盐水漱口后吐出痰液。
Expectoration is an important part of respiratory hygiene, as it helps clear the lungs of mucus.
咳嗽是呼吸道卫生的重要环节，有助于清除肺部黏液。
She experienced difficulty expectorating due to her chronic bronchitis.
由于慢性支气管炎，她很难咳出痰来。
The nurse instructed the child to gently cough to facilitate expectoration.
护士指导孩子轻轻咳嗽以帮助排痰。
Expectoration therapy has been used for centuries in traditional medicine to treat respiratory ailments.
千百年来，传统医学中一直使用咳痰疗法治疗呼吸系统疾病。
After the surgery, the doctor prescribed medication to aid in expectoration and prevent infection.
手术后，医生开了药物帮助排痰并防止感染。
The patient's expectoration turned from clear to yellowish-green, indicating a bacterial infection.
患者的痰由清转为黄绿色，表明可能存在细菌感染。
During cold and flu season, proper hand washing and avoiding close contact can help reduce the spread of expectoration.
在感冒和流感季节，正确的洗手和避免近距离接触有助于减少痰液传播。
Expectoration exercises, such as deep breathing and coughing techniques, are recommended for those with chronic lung conditions.
对于慢性肺病患者，深呼吸和咳嗽技巧等咳痰运动是推荐的。