北師大版高中英語模塊7--Unit 21 Lesson1-3
[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]
