Hawk's-Eye 虎眼石
hawk's eye 鹰睛石 ; [矿物] 鹰眼石 ; 鹰眼石鹰睛石
hawk's s eye 鹰眼石
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N a dark blue variety of the mineral crocidolite: a semiprecious gemstone 鹰眼石
Unlike tennis or cricket, Hawk-Eye's use in football is limited to the rare occasions when there is a disputed goal.
BBC: Hawk-Eye's inventor eyes football expansion
However, both GoalRef and Hawk-Eye's technology must now pass a stadium test before either system can be used in a match.
CNN: FIFA awards goal-line technology licenses
Hawk-Eye's system uses seven cameras to track the movement of the ball and sends a signal -- within a second -- to watches worn by match officials when a goal is scored.
CNN: England on course for goal-line history
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