You have received an update from an unknown source.
您已收到一个未知来源的更新。
Cosmic rays are being produced close to Earth from an unknown source.
宇宙射线由一个未知来源在地球附近产生。
Something “out of the blue” is from an unknown source at an unexpected time.
“出自蓝色(outofthe blue)”的东西指的是意想不到，来源不明。
Always scan a floppy diskette from an unknown source for viruses before using it.
在使用未知来源的软盘前，先进行病毒扫描。
If you receive an update from an unknown source, verify that it is from a web address that you trust before proceeding.
如果你接受来自一个未知的来源的更新，查证，它来自于你在程序之前信赖的一个网住址。
On the contrary, if XML documents are received from an unknown source, be careful to validate XML documents to maintain data integrity.
相反，如果从未知源获取XML文档，则要验证XML文档以维护数据的完整性。
When confronted with the source code of some unknown legacy system, how can an engineer know what grouping of software elements will produce some meaningful description of the architecture?
当碰到某个未知的遗留系统的源代码时，工程师如何能够知道软件元素的什么组合将生成某种有意义的架构描述？
"An unknown armed gang attacked the gas pipeline," an unnamed security source told Reuters, adding that the flow of gas to Israel and Jordan had been hit.
“一帮未知的武装歹徒攻击了燃气管道，”一位没有透露姓名的安全资源官员告诉路透通讯社，他还说到，输往以色列和约旦的燃气承受了打击。
In this method, a constant voltage source (v) is placed in series with the unknown resistor (r) and an ammeter (IM).
在此方法中，恒压源(V)与未知电阻(R)和安培计(IM)相串联。
Finally, simulation proves the capacity to perform the blind source separation with an unknown number of sources and the convergent stability of the new algorithm.
新算法具有与自然梯度算法相同的收敛速度，而且克服了已有算法不能稳定收敛的缺点。仿真验证了新算法的分离性能和收敛稳定性。
The server application, source file, or item can't be found, or returned an unknown error.
找不到伺服器应用程序、来源档案或项目，或传回了未知的错误。
Until recently, astronomers debated whether the source of the intense light was a tightly bound cluster of stars, or perhaps an unknown type of super-star thousands of times bigger than the Sun.
直到现在，天文学家一直在讨论这些强光是由一个恒星簇发出，还是由一颗比我们的太阳大数千倍的超级恒星产生的。
Until recently, astronomers debated whether the source of the intense light was a tightly bound cluster of stars, or perhaps an unknown type of super-star thousands of times bigger than the Sun.
直到现在，天文学家一直在讨论这些强光是由一个恒星簇发出，还是由一颗比我们的太阳大数千倍的超级恒星产生的。
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