曲目是怎么选择的？
The cursor variable tracks the currently selected item.
cursor变量会跟踪当前选定的项。
At selected points of the floor and also at the ceiling are designed different formula tracks using color or lighting.
在地板上选定的点，在天花板上使用颜色或照明设计不同轨道。
According to horizontal well drilling tracks, different perforation patterns are selected.
根据水平井钻井轨迹，选择不同的射孔方式。
Three model typhoon tracks, westerly, northerly and turning northwestward arc selected.
选用西行、北上和西行转向三个模式台风路径。
Three model typhoon tracks, westerly, northerly and turning northwestward arc selected.
选用西行、北上和西行转向三个模式台风路径。
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