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In all feats of fire-eating it should be noted that the head is thrown well back, so that the flame may pass out of the open mouth instead of up into the roof, as it would if the head were held naturally.
在所有吃火的技艺中，都应该注意到头部向后仰得很好，这样火焰就可以从张开的嘴中流出，而不是像头自然地被拿着那样升到屋顶上。