People might be surprised to learn that about 50 million people in the world use, or could benefit from the use of, a wheelchair. Actually, the wheelchair is one of the
For years scientists
First of all, they should be easy to operate. Secondly, they must be able to perform multiple
If one day their dreams come true, these robots can be hugely
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The abacus(算盘) was a great invention in ancient China. The abacus
With the application of the abacus, people summarized many abacus rhymes(珠算口诀),
Since it was easy to make or buy
People find that using abacuses can improve thinking and practical abilities in addition
When a severe car crash occurs on a deserted road, the injured may not rely on nearby witnesses to call the emergency services. Now many modern smartphones
Newly-developed robotic arms
The current robotic arms in China can hardly conduct such complex movements,
According to Chen, the arms
Climbing Mount Everest was once a feat(壮举) reserved for only the bravest mountaineers.These days even inexperienced or elderly climbers try to get to the top of the world.
Twenty years ago, climbers in their 60s
The fortunes of first-time Everest climbers have improved because
Better weather forecasting has helped, too.Travelling from the base camp to the top of the mountain
On May 23nd, 396 climbers attempted
It still pays to treat the
The Dragon Boat Festival has been marked by eating zongzi and racing dragon boats for thousands of years. It
Qu was minister of the state of Chu
After the
Mark Twain was born in Florida on November 30th, 1835.He
The play The Million Pound Bank Note has attracted the attention of a great number of readers. It was the summer of 1903, when two