It vibrates and gives an optical signal 'goal' and he knows a goal has occurred.
手表会震动，显示光学信号‘进球’，这样裁判就知道进球了。”
| 单词 | optical signal |
| 例句 |
原声例句
韩刚B2A“译点通”：听力笔记快速上手宝典 It vibrates and gives an optical signal 'goal' and he knows a goal has occurred. 手表会震动，显示光学信号‘进球’，这样裁判就知道进球了。” |
| 随便看 |
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