1. Teeth have a hard surface layer called enamel. 牙齿有一层叫做釉质的坚硬表层。
2. Made from cast iron, it is finished in graphite enamel. 该物由铸铁制成,表面以石墨搪瓷抛光。
3. They click upon themselves as the breeze rises and turns many-colored as the stir cracks and crazes their enamel. 当微风吹起,它们就就咯喇喇响,当它们的珐琅质被搅动开裂时,它们会变成五颜六色。
4. Another lasting symptom commonly is enamel hypoplasia. 另一个持久的症状通常是牙釉质发育不全。
5. In more severe cases, all the enamel may be damaged. 较为严重者,所有珐琅都可能受到损害。