trackers
n.
追踪者，追踪系统，纤夫( tracker的名词复数 );
例句:
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Would the trackers survive the extreme altitude and cold?
来自BBC
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Can I upload your torrents to other trackers?
我可以上传本站的种子文件到其他站点么?
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The trackers give us bad news.
追踪者带给我们坏消息.
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In a similar fashion, " hybrid trackers " draw on several sources of sensory information.
[ 混合追踪器 ] 也采用类似的方式, 利用若干个来源的感觉资讯.
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Include surveillance cameras, GPS trackers, all of them.
来自SA
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Three companies that sell GPS trackers said sales are soaring.
来自WSJ