Mary-Ann smiled. Notwithstanding her black decayed teeth there was in her smile something sweet and touching.
玛丽—安笑了。 尽管她有一口黑蛀牙，但是她的笑容还是显得很甜美动人。
Black teeth
原声例句
寻欢作乐
Engvid超级外教Ronnie-口语
So if this is a picture of my black teeth, I have a pink tissue above my mouth -- or in my mouth -- that surrounds my teeth like this, and these are called " gums" .
所以如果这是一张我黑牙的照片，我的嘴上方——或嘴里——有一个粉红色的组织像这样围绕着我的牙齿， 这些被称为“牙龈” 。
中文百科
染黑齿 Ohaguro
（重定向自Black teeth）
染黑齿，又称漆齿、墨齿、涅齿，是中国大陆部分地区、日本、越南、**、东南亚、印度一些太平洋岛屿如帕劳、雅浦岛、马里亚纳群岛等地区民族一种传统风俗，即将牙齿染成黑色。每个民族、地区的染黑齿方式有所不同，但一般都与成人礼、婚礼等通过仪礼相关。
英语百科
Ohaguro 染黑齿
（重定向自Black teeth）
Ohaguro(お歯黒) is a custom of dyeing one's teeth black. It was most popular in Japan until the Meiji era. Tooth painting is also known and practiced in the southeastern parts of China, Pacific Islands and Southeast Asia. Dyeing is mainly done by married women, though occasionally men do it as well. It was also beneficial, as it prevented tooth decay, in a similar fashion to modern dental sealants.
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