First, fluoride makes your tooth enamel stronger and less likely to suffer acid damage.

首先，氟能够使你牙齿的釉质更坚固，同时降低酸性的腐蚀程度。

youdao

An analysis of her tooth enamel suggests she ate fruit, nuts and leaves.

通过对牙釉质分析，她以水果，坚果及树叶为食。

youdao

A white spot appears on the enamel where the tooth has started to weaken inside.

牙釉上有个白色斑点，对牙齿内部的保护就减弱。

youdao

Tooth enamel begins to form in the human embryo when a specialised layer of cells, called ameloblasts, in the embryonic tooth bud secretes amelogenin proteins.

BBC: By BBC News Online Science Editor Dr David Whitehouse

The constant exposure strips the hard, protective layer of the tooth called the enamel and could dissolve the entire tooth.

CNN: Juices, tea and energy drinks erode teeth

The Sensodyne spot informed viewers that fruit acids can wear away at tooth enamel.

FORBES: Analysis: Why Do People Like Red Lobster Promos So Much?