unidentate

例句：

1. 1. Thescientist was unable to identify the source ofthe chemical.
   这位科学家无法确定这种化学物质的来源。
2. 2. The unidentate nature of thevirus made it difficult to control.
   这种病毒的未知特性使得控制它变得困难。
3. 3.The unidentate samples were sent forfurther analysis.
   这些无法识别的样本被送去进一步分析。