北师大版高中英语模块7--Unit 21 Lesson1-2
教程:北师大版高中英语模块7(选修)  浏览:527  
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    [00:01.40]Some people use gum to lose weight.

    [00:03.55]They say it controls their appetite.

    [00:05.77]Further research has been carried out,

    [00:07.56]which shows that,

    [00:08.80]if you had chewed sugar-free gum

    [00:10.54]regularly for the last year,

    [00:12.34]it is possible that you would have lost up to

    [00:14.20]5 kilos by now.

    [00:16.30]They found if people chewed 100 times

    [00:18.63]per minute for 12 minutes,

    [00:20.70]70 kilocalories were burned.

    [00:23.29]Gum can also contain medicine.

    [00:25.71]Today, there are gum products

    [00:27.45]that help smokers give up their bad habit.

    [00:30.44]One former smoker has appeared

    [00:31.87]in an advertisement saying,

    [00:33.58]"If I had used this chewing gum

    [00:35.02]when I was giving up smoking ten years ago,

    [00:37.68]I would have been more successful

    [00:39.61]at quitting quickly and much healthier today."

    [00:43.26]However, we must not forget the negative

    [00:45.59]side of chewing gum.

    [00:47.25]Diet specialists say we should avoid it.

    [00:50.29]Why? They state that chewing starts

    [00:52.78]the production of stomach acid

    [00:54.33]and digestive juices.If we chew gum,

    [00:57.28]it will cause our bodies to believe

    [00:59.16]we are digesting food

    [01:00.82]and our stomachs will produce digestive juices

    [01:03.65]unnecessarily.This will make digestion more

    [01:06.18]difficult and may cause feelings of sickness

    [01:09.09]or even headaches.

    [01:09.95]

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