unknown sample 未知样品 ; 未知样本
Identification of unknown sample 盲样鉴定
unknown water sample 未知水样
Unknown Complex Sample 复杂未知样品
sample separation unknown 样本分割信息
The fact that a DB2 UDB SAMPLE database is used by the server is unknown to this client (and the client doesn't require the DB2 client drivers installed to work).
对于该客户机来说，它不知道该服务器使用DB 2 UDB SAMPLE数据库这个事实(并且，该客户机不要求安装DB 2客户机驱动程序)。
A sample of a known compound must be utilized in order to assure identification of the unknown compound.
为了确保未知化合物的识别，必须使用已知化合物的样品。
Three samples consisted of standard or quasi-standard substances with known specific activities of some nuclides while the radioactivity of the other sample was unknown.
该比对中的三种样品是由一些具有已知核素比活度的标准物质或准标准物质构成，而另一种是活度未知的盲样。
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