"For a long time, roboticists have used DC [direct current] motors to make robots move," says Mike Tolley at the University of California San Diego.
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曾经是生意场上的对手，如今却成为了合作伙伴，日系电视品牌纷纷向中国制造企业靠拢的背后，究竟又是什么因素驱动着他们做出这种改变？，这一点在同城约会中也有详细论述
In the months before, space agency officials were in frequent contact with the State Department, which disseminated the latest predicted trajectories to embassies across the world. In these situations, oops doesn’t cut it: When one of the Salyuts, a Soviet space station model, was deorbited a few decades ago, flaming bits were littered across Argentina, scaring people and requiring the deployment of at least a few firefighters, according to local newspaper reports.