Today, robots come in all shapes and sizes. They can’t complain, even if the work is hot, heavy and repetitive. And they can work or play all day --- without taking bathroom breaks or getting bored. 　　On the Job 　　Most factories in the world use robots to do everything from building cars to filling chocolate boxes. Like humans, these machines have elbow and wrist joints that move and rotate. But, unlike a human arm, a robot’s joints will never get stiff and can rotate 360 degrees. The end of the arm can be fitted with devices to perform different tasks. This could be a welding point, suction cups or gripping fingers for lifting and moving objects. Around the world, an army of these computer-controlled industrial robots is at work 24 hours a day. 　　Perfect Friend 　　Robopets are high-tech robots programmed to play. They can communicate with their owners and recognize voices. Each one will develop a different “personality”. They can be a lot of fun to play with, but these robots can also be helpful to people who are sick and can’t look after a real animal. Many doctors believe that when a person is happy and laughing, their body heals itself faster. A robopet might be just what the doctor ordered! 　　NeCoRo is a robot cat that has been developed to be more than a toy. The robot uses sensors that can detect movement and sound. It can tell whether its owner is happy or sad by the tone of his or her voice. It can even store helpful information in its memory, such as when its owner needs to take medicine. NeCoRo does not give automatic responses like other robopets. Its behaviour changes over time --- just like a real pet. 　　Help: 　　complain v. 抱怨 　　rotate v. 旋转 　　stiff adj. 僵硬的，不易弯曲的 　　weld v. 焊接 　　suction cup n. 吸附杯 　　gripping fingers n. 钳形指 　　robopet n. 机器人宠物 　　heal v. 康复 　　detect v. 查出，发现