This Hubble Space Telescope image was captured in August 2009 and December 2009 with the Wide Field Camera 3 in both visible and infrared light, which trace the glow of sulphur, hydrogen, and iron.

这张由哈勃太空望远镜成像的图片由用以追踪硫、氢、铁的第三代广域照相机以可视光与红外光摄于2009年8月及2009年12月。

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A significant amount of disk space is required for effective logging, and it increases many fold in a multi-threaded environment where numerous threads write their trace.

要进行有效的日志记录，需要使用大量的磁盘空间，并且在多线程环境中，所需的磁盘空间会成倍地增加，因为大量的线程都在记录它们的跟踪信息。

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The Linux Trace Toolkit next generation ( LTTng) provides a user-space visualization facility for tracing kernel and user-space activities.

Linux 跟踪工具包下一代 ( LTTng) 为跟踪内核和用户空间活动提供用户空间虚拟化设施。

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LGM1, because its discoverers half wondered whether they had come across the first trace of little green men in outer space.

ECONOMIST: Obituary

The typical Viennese coffee house -- an elegant institution with high ceilings, marble-top tables and a stack of newspapers to make one linger over an impeccable black brew with a customary glass of water -- may be more famously known than its Ukrainian cousin, but to trace back the origin of the communal coffee space, you have to go to Lviv, a Medieval city in western Ukraine.

BBC: Tracing the coffee house revolution to its Ukrainian roots

Photoelectric cells and lasers, nuclear power and fiber optics, space travel, and even semiconductors all trace back to his theories.

NPR: Einstein: Relatively Speaking, a Complicated Life