🚀 第一步：准备 Node.js 环境
const sp = speed[i];
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"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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If you're an early adopter looking to try out AR glasses, it's hard to argue with the $299 price tag. For reference, Xreal recently launched a more affordable version of its glasses called the Xreal 1S, priced at $449.