关于道德的英语文章500字【热门一篇】

The fields his study， nature was his book.

Travelers can choose different modes of transportation which have advantages and disadvantages. Airplanes are the fastest but also the most expensive. Buses and trains are less expensive， but they soon make you feel cramped and uncomfortable. Ships provide you with comfort unless you get seasick. Most people can afford traveling by bicycle， which， although slow， can limber up your muscles and get you closer to nature.