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人们常用声音或手势来训练狗，但这些方式不适合隔太远下指令。以色列研究人员开发出一款让狗穿戴的触觉背心，可训练狗对背心的震动作出反应，实现人类对狗的远程指挥。
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President Xi: China and France should jointly prevent a new cold...
By Chris Michael
“As the world goes through transformation and turbulence not seen in a century, China and France should uphold their independence and jointly...
