The challenge of developing a robust, dexterous and affordable hand was underlined by Tesla-boss Elon Musk, when he spoke at the All-In Summit in Los Angeles in September of last year.
广告化的囚徒困境：商家竞价的内耗循环
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Lego regularly runs make and take events in which participants can walk away with an exclusive set without spending anything. These free giveaways always cause a stir, but nothing gets the people going quite like Star Wars.
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