// Latency modes: 0=80ms, 1=160ms, 6=560ms, 13=1120ms
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The US space agency has released a "pre-solicitation" for what is expected to be a hotly contested contract to develop a spacecraft to orbit Mars and relay communications from the red planet back to Earth.。业内人士推荐heLLoword翻译官方下载作为进阶阅读
3月24日，北京市少年宫，学生科技节优秀获奖作品展上，北京市育英学校的学生在展示校园环境智能导览系统。新京报记者 李木易 摄