n.查明；确定；调查；探知

The ascertaining of the exact cause of the accident is still ongoing.
确定事故确切原因的工作仍在进行中。
The historian's task is to ascertain the truth about past events.
历史学家的任务是查明过去事件的真相。
Before prescribing medication, doctors need to ascertain the patient's allergies.
开药前，医生需要确定患者的过敏情况。
Through careful observation, scientists ascertained the migration patterns of the birds.
科学家通过仔细观察，确定了鸟类的迁徙模式。
The detective's job is to ascertain the facts and identify the culprit.
侦探的工作是查明事实并找出罪犯。
We need to ascertain the availability of the venue before finalizing the date for the conference.
在确定会议日期之前，我们需要确认场地的可用性。
After thorough research, they ascertained that the artifact was indeed from the ancient civilization.
经过深入研究，他们确定该文物确实来自古代文明。
It's essential to ascertain the customer's needs before developing a new product.
在开发新产品之前，确定客户的需求至关重要。
The lawyer sought to ascertain the authenticity of the document by examining its signatures.
律师通过检查签名来确定文件的真实性。
In order to provide accurate treatment, doctors must first ascertain the patient's medical history.
为了提供准确的治疗，医生首先必须确定病人的病史。