Who fought at the Battle of Verdun in 1916?

谁参加了1916年的凡尔登战役？

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But this digital Battle of Verdun is not the only challenge for Google as Mozilla is also launching its mobile operating system: FirefoxOS. To make a long story short, FirefoxOS is the equivalent of ChromeOS for smartphones: a light-weight mobile operating system where the user interface and all applications are web-based.

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