唾液要用一小时的时间才能中和掉由食物和饮料产生的酸性物质。
Saliva takes about an hour to neutralise the acid created by a food or drink.
研究人员表示：“牙齿每天能抵抗五次的酸性物质侵蚀。”唾液要用一小时的时间才能中和掉由食物和饮料产生的酸性物质。
'a tooth can withstand five acid attacks a day,' says one researcher. 'Saliva takes about an hour to neutralise the acid created by a food or drink.
研究人员表示：“牙齿每天能抵抗五次的酸性物质侵蚀。”唾液要用一小时的时间才能中和掉由食物和饮料产生的酸性物质。
'a tooth can withstand five acid attacks a day,' says one researcher. 'Saliva takes about an hour to neutralise the acid created by a food or drink.
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