Nowadays there are scientific developments towards how to assist people in doing kitchen and laundary works, travel by mass transit and airplane, etc. By doing so, people have got lots of spare times to do other activities, such as watching TV, and cinema, dine out and camping, etc.
As the results, people are suffered easily from obesity, autism, depression, allergy,diabetes, arthritis, osteroporosis, heart diseases etc. With all these defects which are resulted mostly from the rapid scientific developments.
Partly according to ”The Advanced Learner's Dictionary of Current English with Chinese Translation ” published by HongKong Oxford University Press in 1975