看上去像是被烧焦了的皮肤，又像是溃烂了的样子，以及满嘴的黄牙，裂开了，布满了红色的斑点。
His skin looked as if it was burnt and sore, and his teeth were yellow, but there were cracks in them with a red stain.
除了引起肺气肿，香烟还会导致黄牙，面色苍白，气短。
Cigarettes cause yellow teeth, pale complexion, shortens the breath, in addition to promoting emphysema.
多喝茶会让你的牙变黄，但是对你的身体有好处.
Too much tea will brown your teeth,but it's good for your health.
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