unknown substance

例句 (10)

• The lab is analyzing the unknown substance found at the crime scene.实验室正在分析犯罪现场发现的未知物质。
• Investigators are trying to identify the unknown substance that caused the illness.调查人员正试图确定导致疾病的未知物质。
• A sample of the unknown substance has been sent for testing.已将未知物质的样本送去检测。
• The report mentioned the discovery of an unknown substance in the water supply.报告提到了在供水中发现未知物质。
• Emergency services were alerted to a spill of an unknown substance.紧急服务部门接到了关于未知物质泄漏的警报。
• Scientists are baffled by the properties of this unknown substance.科学家们对这种未知物质的特性感到困惑。
• The package contained an unknown substance that emitted a strange odor.包裹中包含一种散发出奇怪气味的未知物质。
• They carefully collected samples of the unknown substance for further examination.他们仔细收集了未知物质的样本以供进一步检查。
• The military is concerned about the potential threat posed by an unknown substance.军方对未知物质构成的潜在威胁表示担忧。
• Initial tests failed to reveal the nature of the unknown substance.初步测试未能揭示未知物质的性质。