Saliva acts as a barrier, protecting the teeth by neutralising acidic foods such as oranges, and the acid produced by bacteria as they break down foods.
而唾液正像一道保护牙齿的屏障，把橘子等酸性食物以及细菌分解食物产生的酸性物质中和掉。
Kimchi has antibiotic functions as lactic acid bacteria produced in the process of fermentation suppresses growth of harmful bacteria.
由于在发酵过程中产生的乳酸菌抑制了有害菌的生长，所以泡菜有抗生素作用。
It's then processed using lactic acid, the waste product produced by bacteria in the meat.
然后，要用乳酸，这种由肉里的细菌产生的废料，继续加工。
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