If you do choose to consume beverages that stain, consider using a straw so the liquid is not hitting off your teeth.
如果你真的选择喝那些会在牙齿上留下污渍的饮料，你可以考虑用吸管，这样饮料就不会碰到你的牙齿。
Some foods can stain the teeth, as of course can smoking.
某些食物会使牙齿着色，吸烟当然也会。
A single dose is less likely to stain teeth in children or produce adverse reactions.
这种剂量不太可能污染儿童的牙齿或者产生不良反应。
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