For more than fifty years, a worker was forced to sit on the back of a truck and slowly drop plastic barriers（障碍）

to set out lanes（车道）on the Golden Gate Bridge in San Francisco. Every day, their direction changes to control the traffic, meaning an employee had to go through the difficult task every twenty-four hours.

But a new piece of machinery means the work can be completed in a matter of minutes. A new “zipper truck” has been introduced. The vehicle lays and moves a lane barrier as it drives over the bridge. Last weekend, the bridge was closed so the new safety barrier, designed to reduce the dangers of head-on crashes, could be set up.

For the longest period in its nearly eighty-year history, the bridge was closed early Saturday to all but walkers, cyclists and buses to set up the barriers on the 1.7-mile bridge. A survivor of a 2008 head-on crash on the bridge spoke Sunday from a wheelchair to help introduce the new barrier, made of steel-clad concrete（铜包混凝土）blocks that can move across the bridge’s six lanes to meet traffic needs.

Gr. Grace Dammann pushed for a safer barrier since becoming unable to walk after the accident. She said she decided to drive near the middle of the bridge, which was called the “suicide（自杀）lane”, because she and her daughter were running late. Brian Clark, who was driving in the opposite direction, had just learned his father had cancer. “He suddenly lost control of the wheel, crossed over and hit my car,” Dammann said.

She said she and Clark became friends as they persuaded（说服）the government to use the MYM30 million barrier. “I am so thankful,” said Dammann, who came to the ceremony with Clark.

A plan has been officially presented to build the world's deepest swimming pool in Cornwall,England. The pool, which is being built by the company Blue Abyss, will be used to train astronauts and develop underwater robots.

The Aerohub Enterprise Zone at Cornwall airport will house the pool, which may cost £ 150 million to build. It will be 40 metres wide and 50 metres deep. For comparison, Nelsons Column in Trafalgar Square in London is 52 metres tall. So this pool would almost be as deep as the column is tall. It will also be the world's largest pool by volume ( 容 积), containing enough water to fill 17Olympic-sized swimming pools.

The pool will be covered by a roof which can be easily removed and a 30-tonne crane(起重机)will lower heavy objects into it. These could include film sets and restaurants of the International Space Station (ISS). Training astronauts is going to be one of the pool's main uses. Astronauts train in swimming pools because moving underwater is similar to being weightless in space.

Astronaut Tim Peake said, "This project will help us to widen our knowledge of how humans and technology can work in extreme environments for the benefit of people and the planet." In 2015, Peake became the first   British astronaut to board the ISS.and in 2016, he became the first British astronaut to go on a spacewalk.

John Vickers, who is the head of Blue Abyss and a former army diving instructor, came up with the idea for the pool. As well as having research and training purposes, he says the pool will be “a fantastic education centre for children and university students".

Blue Abyss says the pool could create up to 160 jobs and bring in £ 8 million a year for the local economy. The pool is scheduled to open in 2023.

“Robots can do almost everything” said Jan Lindmark, president of ABB Engineering (Shanghai) Ltd, a branch of the world’s leading power and automation company in April,2004.

ABB invented the world’s first electric robot controlled by microcomputer in 1974.Twenty years later. It introduced the technology into China. Since then, the company has been experiencing rapid development in the country.

“The industry grows very fast in China,” Lindmark said “We have enjoyed strong growth over the past few years. We expect more this year”.

According to Lindmark, enterprises(企业)in China are paying more and more attention to the use of robots in the manufacturing process. “Before, we thought that the inexpensive labor in the country might be a disadvantage for our development,” he said. “However, we are glad to see that more and more enterprises here are realizing the importance of quality control compared with manual work, robots’ work secures(使安全)quality.”

Currently, the company controls about 30 to 35 percent of the country’s robotics market. “I’m proud of all the successful movements we have made here,” Lindmark said “I have never experienced such great achievements elsewhere in my 21 years’ working for ABB.”

“We have very intelligent and skilled staff here,” he said. “I’m always trying to organize the company as a family I feel the responsibility to take care of it and bring it up.