examination of water supply hygiene

例句：

1. 1. The doctor performed an examination of the patient's symptoms before prescribing medication.
   医生在开药之前对病人的症状进行了检查。
2. 2.Before the exam, students were given a brief overview of the topics to be covered.
   考试前，学生们被简要地介绍了将要覆盖的课题。
3. 3. The team conducted an examination of the equipment to ensure it was functioning properly.
   团队对设备进行了检查，以确保其正常工作。