Today, because of shrewd advertising and public health campaigns, many Americans habitually give their pearly whites a cavity-preventing scrub twice a day, often with Colgate, Crest or one of the other brands.
如今，由于精明的广告和公共卫生运动，许多美国人习惯于每天两次用牙膏（如佳洁士、高露洁或其他品牌）清洁牙齿，以预防龋齿。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。