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1、雅思A类小作文：甜食对口腔健康的影响You should spend about?20?minutes on this task.Eating sweet foods produces acid in the mouth, which can cause tooth decay. (High acid levels are measured by low pH values)Describe the information below and discuss the implications for dental health.Write at least?150?words.?范文The p
2、rovided line graph shows the acid level of our mouth which is created by the consumption of fruit sugar, cane sugar & honey and compares their effects on our tooth decay.所提供的曲线图显示了我们的口腔酸性水平，这是由食用水果糖、甘蔗糖和蜂蜜所产生的，并比较了它们对我们蛀牙的影响。When the pH level in the mouth is above 5.5, acidity remains at such a leve
3、l that teeth are unlikely to be in danger from decay. Sweet foods, however, cause pH in the mouth to drop for a time, and the longer the pH levels remain below 5.5, the greater the possibility for decay to occur. The illustration compares the fruit sugar, cane sugar and honey, which are the most com
4、mon ingredients of sweet foods, causes the pH level to drop below the danger level after 5 minutes.当口腔内的pH值超过5.5时，酸度就会维持在这样的水平，牙齿不太可能有蛀牙的危险。然而，甜食会使口腔中的pH值下降一段时间，pH值维持在5.5以下的时间越长，腐烂的可能性就越大。该图对比了水果糖、蔗糖和蜂蜜，这是最常见的甜食成分，使pH值在5分钟后下降到危险水平以下。Among these 3 sweet items, cane sugar decreases the pH level most q
5、uickly and causes to remain the level under the danger level for the longest period (over 30 minutes) and thus produce the greatest risk among the three. After consuming the cane sugar, the pH level drops to level 3.5 and remains there for over half an hour. On the other hand, fruit sugar causes the
6、 acidity level of mouth to fall under pH level 4 in 5 minutes and remains under threat level for 20 minutes. Finally, the honey appears to be less risky among the three causes the pH level to drop to 4.7 in 5 minutes and proceed to above pH 5.5 level within 15 minutes of consumption.在这3种甜食中，甘蔗糖降低pH值
7、的速度最快，使其停留在危险水平下的时间最长(超过30分钟)，从而在这3种食品中产生最大的风险。食用蔗糖后，pH值下降到3.5级，并在那里停留了半个多小时。另一方面，果糖会使口腔的酸度在5分钟内下降到pH值4以下，并在威胁水平下保持20分钟。最后，在这三种因素中，蜂蜜的风险似乎要小一些。这三种因素导致蜂蜜的pH值在5分钟内下降到4.7，在食用15分钟内上升到5.5以上。In conclusion, all of the sweet items possess the possibility of causing tooth decay and honey and fruit sugar are likely to cause less decay than the cane sugar does.总之，所有的甜食都有可能引起蛀牙，蜂蜜和水果糖比蔗糖更容易引起蛀牙。