嗽

例句：

1. 1. He caught a cold and started coughing frequently.
   他感冒了，开始频繁咳嗽。
2. 2. She sneezed several times after being in the polluted air for a long time.
   她在长时间暴露在污染空气中后打了几次喷嚏。
3. 3. The patient was coughing up blood, which worried the doctor.
   病人咳出了血，这让医生很担心。