Trace the origin of Chinese characters to explore culture behind them.

纵观每一个汉字的来源，透视汉字后面的中国文化。

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From this unique perspective, we can scrutinize their spiritual status and trace the origin of the Chinese intellectual enlighteners.

从这一特殊的角度，既可以审视启蒙者的精神状态，也是中国知识启蒙者由来的溯源。

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By rewinding the video of a zebrafish embryo, the researchers were able to trace the origin of cells that formed specific tissues, such as the retina at the back of the eye.

通过回放斑马鱼胚胎的录像，研究者可追寻出组成特定组织比如它眼球上的视网膜的原细胞。

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New regulations likely to be proposed by the State Department next year may follow guidelines being drafted by the UN and the OECD, a rich-country club, that will advise companies on how best to trace the origin of their materials.

ECONOMIST: Congo's conflict minerals

The proposals to be brought forward would address the fact the police - who can already tell when, where and who made a mobile phone call or sent a text message - cannot always trace the origin of an email, a message sent via instant messaging or a phone call made over the internet.

BBC: 'Fresh proposals' planned over cyber-monitoring

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