411 REFERENCE · Wikibooks
English-Hanzi/Whitening toothpaste cannot change the natural color
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Whitening toothpaste cannot change the natural color or discolor the teeth through surface stains or decay.
美白牙膏不能通过表面污渍或腐朽改变天然颜色或使牙齿变色。