“功成不必在我，功成必定有我。”
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。关于这个话题，heLLoword翻译官方下载提供了深入分析
Credit: Amy Sussman/Getty Images。关于这个话题，旺商聊官方下载提供了深入分析
"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.