The blue flame of the exhaust stabbed the darkness.

排气口的蓝色火焰划破黑暗。

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The blue flame of the exhausts stabbed the darkness.

排气口的蓝色火焰划破黑暗。

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A blue flame is indicative of the presence of methane in the flatus.

蓝色火苗意味着屁里含有甲烷。

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On a hot June evening at a ramshackle former gliderport 30 miles east of Dallas, John Carmack's rocket engine lit up with its blue flame spewing from the nozzle.

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"It's a very reassuring feeling to turn on the stove, see that blue flame and know you had a part in bringing a stable energy source to your community, " Glenn says.

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The Windows Phone 8X will come in a variety of colors including California Blue, Graphite Black, Flame Red and Limelight Yellow.

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