北師大版高中英語模塊7--Unit 21 Lesson1-3

[00:01.17]It has also been proven that chewing gum [00:03.50]for long periods of time means [00:05.48]that the body does not have time to rest. [00:07.72]If this is the case, [00:08.95]the stomach may become tense. [00:10.85]Eventually this could lead to stomach sickness. [00:14.15]Although some dentists claim that sugar-free [00:16.50]gum decreases the possibility of tooth decay, [00:19.32]others are not convinced. [00:21.37]They argue that if dentists encouraged its use, [00:24.02]the wrong message would be sent out [00:26.57]and children might chew gum instead [00:28.25]of brushing their teeth. [00:29.99]Unless we are careful, [00:31.41]the number of young people with bad teeth [00:33.36]will rise and this will become [00:35.47]a serious problem. [00:37.07]On balance therefore, [00:38.39]maybe it would be better to forget chewing gum, [00:40.84]sugar-free or otherwise, [00:42.71]and rather brush your teeth regularyly, [00:45.12]eat healthy foods avoiding sugar, [00:47.22]never start smoking, [00:48.83]and chew a mint leaf if you're worried about [00:50.79]your breath! [00:51.67]

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