Your stomach cells secrete hydrochloric acid, a corrosive compound used to treat metals in the industrial world.
你的胃会分泌盐酸，这是工业中用来处理金属的腐蚀性化合物。
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The one study that analyzed kimchi and reported high levels of N-nitroso (the carcinogenic compound) found this after the kimchi was mixed with nitrites in "simulated human stomach conditions."