unknown cause

例句 (10)

• The fire destroyed the building, but its origin remains an unknown cause.大火烧毁了建筑，但起火点仍是未知原因。
• Doctors are trying to determine why he fell ill; for now, it's a disease of unknown cause.医生们正试图确定他生病的原因；目前，这是一种原因未知的疾病。
• The official report concluded that the plane crashed due to an unknown cause.官方报告的结论是，飞机坠毁是由于未知原因。
• She died of a rare condition with a completely unknown cause.她死于一种完全原因未知的罕见疾病。
• Many historical extinctions are still attributed to an unknown cause.许多历史上的物种灭绝事件仍被归因于未知原因。
• The system shutdown was triggered by an unknown cause, and engineers are still investigating.系统关机是由一个未知原因触发的，工程师们仍在调查。
• His sudden disappearance is a mystery, currently logged as stemming from an unknown cause.他的突然失踪是个谜，目前记录为源于未知原因。
• For a long time, the strange phenomenon was a scientific puzzle of unknown cause.很长一段时间里，这个奇怪的现象是一个原因未知的科学难题。
• The sudden surge in the stock market had an unknown cause, baffling analysts.股市的突然飙升有一个未知的原因，令分析师们困惑不已。
• If a patient's symptoms persist due to an unknown cause, further tests are required.如果病人的症状因未知原因持续存在，则需要进行进一步检查。