on-line software system 联机软件系统
line software system
线路软件系统
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In tests last year at Yankee Stadium and Citi Field, MLB experimented with the Hawk-Eye animation system that is used to judge line calls in tennis and the TrackMan radar software used by the PGA Tour.
WSJ: MLB hoping for large replay expansion in 2014
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