The method of trace detection of benzene, toluene, ethylbenzene, and xylene(BTEX) was studied in ambient air using laser two-photon ionization.

利用激光双光子电离技术研究了在大气压力下探测痕量苯系物的方法。

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Similarities in the REMPI spectra of all the ions could lead to greater trace detection sensitivity if the total ion yield is concerned instead of only the parent ions.

由于共振增强多光子电离（REMPI）母体离子谱与碎片离子谱的相似性，可用探测总离子信号的方法来替代单独的母离子探测，有效地提高痕量探测的灵敏度。

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Connection leak detection: Special trace that helps identify the culprits when database connections are not properly released after being used by an application.

连接泄漏检测：如果应用程序在使用数据库连接后未能将其正常释放，这种特殊的跟踪能帮助您辨识问题的原因。

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He also told the House of Commons that all UK airports must have new "explosion trace detection equipment" by the end of the year.

BBC: Failed airline bombing statement

It is also important to make sure that operators of Explosive Detection Systems (EDS) and Trace Detection Systems (TDS) learn to identify specific X-ray transmission properties of the materials they are called upon to identify.

FORBES: Young Juvenile Makes An Explosive With Baby Powder And Other Tales From The URI Explosives Lab

He told CNN that there needed to be greater investment in random searches by agents with explosive trace detection equipment and greater deployment of CCTV cameras, saying the extra investment needed in mass transit security amounted to a fraction of the economic cost of a successful attack.

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