奇速英语

A bionic(仿生学的) arm is not a real arm. It is mechanical(机械的). It works like a real arm. It changes a person’s life. A person does not need so much help from other people anymore because he has this arm. He can play games or ride a bike. He can tie his shoes.
Campbel Arid got his bionic arm in 1998. He was the first person with a bionic arm in the world. His arm weighed 1.8 kilograms. It used a battery(电池).
Now the technology(技术) is changing very quickly. Today’s bionic arm reads signals from a person’s muscles(肌肉). Scientists believe that the technology will change soon. New technology will make a bionic arm read a person’s mind.

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