如今，人们出行并不是一种需求，而是一种体验，一种享受新事物的目的。现在旅行也成为一个高度组织性的行业。汽车，一流的道路，特快，大型游船，喷气式飞机，所有的一切为我们提供了舒适安全的旅行。科学家们还发明了能将我们带到外太空的机器。最终我们可以到月球作便宜的旅

Investing money in the stock market is not the safest way in the world to make more money. There is no guarantee that the company you invest in will do well and that the stock will go up. The company may do badly. Then the stock will go down and the investors will lose money. The stock may go up or down for a number of very complex reasons. Everyone wants the stock market to go up, but some times even when a company does well the stock may go down. This is usually tree for all stocks.

Nowadays people travel, not from necessity, but for the joy and excitement of seeing and experiencing new things. Traveling, of course, has now become a highly organize business. There are cars and splendid roads, express trains, huge ships and jet airliners, all of which provide us with comforts and security. Scientists have also invented machines that can explore outer space. Eventually there will be cheap day excursions to the moon and honeymoon on Venus. People will be able to travel from one planet to another by a space shuttle.