Today, the world's diversity (多样性) of food crops is quickly decreasing. But scientists around the world are taking action. They are building seed banks. At seed banks, scientists store the seeds of many different crops.

    There are now 1,400 seed banks around the world. However, some banks are in warm countries. If the electricity fails, the seeds will get too hot and die. Other seed banks are in countries troubled by war. Sometimes people damage the seed banks. If this happens, valuable seeds can be lost forever!

    The organization Global Crop Diversity Trust decided they wanted to deal with this problem. So, they decided to build a global seed bank. This seed bank would contain a back-up, or extra copy, of all the world's seeds. Smaller seed banks would still collect and keep local seeds. But they would also send copies of their seeds to the global bank.

    Scientists from the Global Crop Diversity Trust chose the cold, snowy mountains of Svalbard, Norway to build the global seed bank — the Svalbard Global Seed Vault (斯瓦尔巴全球种子库). Organizations, farmers, or local seed banks store their extra seeds there. And the people who place their seeds in the vault are the only people who can take them out. They pay to ship their seeds to Norway, but it does not cost them any money to store their seeds. The Global Crop Diversity Trust pays for this.

    Cary Fowler is a scientist who heads the Global Crop Diversity Trust. He said, “If the Seed Vault simply supplies seed banks with copies of seeds that those banks lost by accident, the Seed Vault will be worth more than it cost.”

China is a land of bicycles. At least it was back in 1992 when I traveled the country. Back then everyone seemed to be riding a bicycle. Millions of them，all black. Cars were rare. Yet since my arrival in Beijing last year，I've found the opposite is true. There are millions of cars. However，people still use their bicycles to get around. For many，it's the easiest and cheapest way to travel today. Bicycles also come in different colors—silver，green，red，blue，yellow，whatever you want.

    It's fun watching people biking. They rush quickly through crossroads，move skillfully through traffic，and ride even on sidewalks（人行道）.Bicycles allow people the freedom to move about that cars just can't provide.

    Eager to be part of this aspect of Chinese culture，I decided to buy a bicycle. Great weather accompanied my great buy. I immediately jumped up on my bicycle seat and started home.

    My first ride home was orderly（守秩序的）．To be safe，I stayed with a “pack”of bikers while cars on the streets came running swiftly out of nowhere at times.I didn't want to get hit. So I took the ride carefully.

    Crossing the streets was the biggest problem. It was a lot like crossing a major highway back in the United States. The streets here were wide，so crossing took time，skill and a little bit of luck.

    I finally made it home. The feeling on the bicycle was amazing. The air hitting my face and going through my hair was wonderful. I was sitting on top of the world as I passed by places and people. Biking made me feel alive.

    The belief that new technologies are causing the death of work is the idea that never goes away. Despite evidence to the contrary, we still view technological change today as being more rapid and dramatic in its consequences for work than ever before. But this is nothing new. People have always viewed the technological changes that take place during their lives as the most dramatic and dangerous that ever happened in history.

    In the 1930s, the British economist(经济学家) John Maynard Keynes predicted the widespread use of electricity would produce a world where people spend most of their time doing nothing. In the United States during the 1960s, the government repeatedly investigates fears that automatic machines would permanently reduce the amount of work available. In 1988, one Australian historian claimed that at least a quarter of the workforce would be without jobs within 10 years because of computers.

    Of course, none of these disasters came to pass in the United Kingdom, the United States and Australia, or anywhere else.

    Yet today, we are seeing the return of these predictions, with some experts claiming the world of work is once more undergoing radical(激进的)and unprecedented(前所未有的) change. They argue that robots and other workplace technologies are causing a reduction in the total amount of work available, or are bringing a more rapid pace of substitution of machines for humans than has been seen previously.

    But there is a little evidence to support such beliefs. Statistics show that the percentage of people in work, the number of hours they work, and how frequently they change jobs have remained remarkably constant over the past 20 years.

    This stability should not come as a surprise. There are good reasons why we should not expect new technologies to cause the death of work. New technologies always cause job losses, but that is only part of the story. What also needs to be understood is how they increase the amount of work available.

    One way this happens is through the increases in incomes that accompany the use of new technologies. With the introduction of these technologies, goods and services can be produced faster, which results in higher real incomes for workers. Higher incomes then increase demand for other products and consequently more workers are needed to make them. Additionally, while new technologies are likely to substitute for some types of workers, they will also increase demand for other types of workers, especially those with higher level skills and expertise.

    So, the end of work is no closer today than at any time in the past. But there is still a need to keep disproving the prediction, to reduce people's fears.

    One family, which moved from Japan and settled at the turn of the century near San Francisco, had built a business in which they grew roses and trucked them into San Francisco three mornings a week.

    The other family also marketed roses. For almost four decades the two families were neighbors, and the sons took over the farms, but then on December 7, 1941, Japan attacked Pearl Harbor. Although the rest of the family members were American, the father of the Japanese family had never been naturalized. As they planned to leave the country, his neighbor made it clear that, if necessary, he would look after his friend's nursery (花圃). It was something each family had learned in church-Love the neighbor as themselves. "You would do the same for us," he told his Japanese friend.

    It was not long before the Japanese family was transported to a poor landscape in Canada. A full year went by. Then two. Then three. While the Japanese neighbors were in Canada, their friends worked in the greenhouses. Sometimes the father's work could stretch to 16 and 17 hours. And then one day, when the war in Europe had ended, the Japanese family packed up and boarded a train. They were going home.

    What would they find? The family was met at the train station by their neighbors, and when they got to their home, the whole Japanese family were shocked. There was the nursery, complete, clean and shining in the sunlight, neat, prosperous and healthy. And the house was just as clean and welcoming as the nursery. And there on the dining room ground was one perfect red (玫瑰花蕾), just waiting to unfold-the gift of one neighbor to another.

The world has been extremely impressed by China's high-speed trains that cross the country by the hundreds in all directions every day, but in one corner of this vast land is a gentle reminder that life was not always this fast.

Those fortunate enough to travel to Jiayang in Sichuan province will find railway carriages dragged by steam locomotives(火车头), among the last steam trains operating in China and still running every day. First used to transport coal from Jiayang Coal Mine 62 years ago, today they transport local farmers and their produce to market and serve as a tourist attraction.

"In the early days of the railway, farmers headed for the farm produce market sitting beside coal," said Liu Chengxi, the Jiayang official in charge of the trains. "As coal production has stopped, the trains are now exclusively(专门地)for farmers and tourists."

The narrow railway, only 76.2 cm instead of the standard 144 cm, stretches for 19. 84 km, with the trains reaching a top speed of 20 km/h.

A one-way ticket costs 5 yuan for seated passengers and 3 yuan for standing passengers on the ordinary trains regardless of whether they are travelling empty-handed or with animals or vegetables. But Li Cuirong, who has worked as a train dispatcher(调度员)for more than 20 years, recommends tourists pay 80 yuan for a sightseeing train, as the carriages, which have 37 seats, are more comfortable and air-conditioned. A one-way trip takes about one and a half hours.

The scenery is dramatic as the train winds through the mountain, passengers can view chickens and geese wandering among the orange trees and butterflies dancing over the fields and ponds.

Rob Dickinson, a steam train lover from the United Kingdom, has ridden the trains twice. He hopes the narrow line can last long enough for him to find the time to get back again.