溯源研究
基于1个网页-相关网页
Oil-gas source trace 油气源追踪
Attack Source Trace Back 攻击源回溯
trace to the source 溯源 ; 查明来历
trace the source 追踪攻击者来源
trace to its source 追寻根本
·2,447,543篇论文数据，部分数据来源于NoteExpress
Samples of the oil have also been sent for testing to try and trace its source.
BBC: Oil taking toll on sea birds
But despite spills being "comparatively rare", he added that it would be difficult to trace the source.
BBC: Seabird deaths substance 'identified as oil substance'
Where the material originates outside the UK, the Internet Watch Foundation will attempt to trace the source and pass details to the National Criminal Intelligence Service.
BBC: NEWS | UK | Policing the net
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