The researchers demineralized the 180-million-year-old fossil of an ichthyosaur...and left behind soft, flexible tissues.

研究人员对1.8亿年前鱼龙化石进行了去矿物处理，留下柔软且有韧性组织。

That environment favors bacteria like mutans streptococci and Lactobacillus, which demineralize enamel and the dentin beneath it, and if untreated, it can eventually result in a cavitated caries lesion.

酸性环境下菌例如变形链球菌乳酸杆菌，可以食牙其下层牙本脱矿，如果不加以治疗，最终会形成空洞型龋齿。

' 'That's to try and keep his physical condition up – to stop him atrophying and his bones demineralizing, his legs pooling, that kind of thing.

” “那是为了努力保持他身体状况——阻止他萎缩，阻止他骨骼脱矿，阻止他腿积水，诸如此类事情。

So typically, dental plaque can form on the surface of teeth, b ut if the pH of the local environment around the tooth surface remains above about 5.5, enamel will not demineralize.

一般情况下，牙菌斑形成于牙齿表面，但当牙表面局部环境pH值持续高于5.5时，牙将不能脱矿化。