挑选牙膏需要注意什么

【新朋友】点击标题下面蓝字【可可英语】加关注【老朋友】点击手机右上角图标【转发分享】内容Fancy toothpastes may come in different colors and boast unusual ingredients, but they probably don't offer better dental health than the average drugstore toothpaste. Here's what to look for if you try a new brand:高档牙膏可能有不同的颜色、独特的成分，但它们对牙齿健康所起的作用并不一定比药店售卖的普通牙膏更好。如果你想换个牌子，应注意下列事项。Abrasives磨擦剂Toothpastes provide a little mechanical help with scrubbing; that's the main reason they exist. Particles of grit help to scrape bacterial plaque from your teeth. Some common abrasives include calcium carbonate, silica, aluminum oxide, and magnesium carbonate. Charcoal can also act as an abrasive, but some dentists caution that ………………………………