折线图
Sweet foods produce acid in the mouth
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.
题目大意：
吃甜食会在口腔中产生酸性物质，从而导致蛀牙（高酸含量通过低pH值测量）描述以下信息并讨论对牙齿健康的影响。
范文示例：
开始段-改写题目：
The graph compares acid level in mouth overtime after people eat sugary foods and the possibility of tooth decay occurrence.
概述段：cane sugar容易导致蛀牙，蜂蜜则不易
Overall, among the 3 sugary ingredients, cane sugar has the highest risk of tooth decay, while honey is least likely to cause the problem. For PH level, the level 5.5 marks the point where tooth decay occurs.
细节段-1: 糖分摄入5分钟后，PH值达到低点
Looking at the information in detail, the initial PH level is 7 at the moment sweet foods are eaten. The first 5 minutes saw a dramatic increase in acidity caused by the 3 ingredients, with PH level standing at around 3.5 for cane sugar, 4.25 for fruit sugar and 4.75 for honey respectively.
细节段-2：每周成分之后的变化
After the intake of honey and fruit sugar, the figures for PH value rise back the safe level at 5.5 after 15 and 20 minutes each, while the same process takes over 30 minutes for cane sugar. In addition, after 25 minutes, the PH statistic for honey recovers to its original level at 7, while it takes 35 minutes for this indicator to return to the initial level after the consumption of fruit sugar. Finally, the PH value for cane sugar consumers recovers after 40 minutes.
