And at an emergency, the jacket of a police officer, ambulance crew or fire-fighter could flash warnings or directions to anyone nearby or passing.

或者遭遇突发情况的时候，警员、救护队或消防员的制服上会出现安全警告的提示，为附近或过路人流指示安全方位。

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And at an emergency, the jacket of a police officer, ambulance crew or fire-fighter could flash warnings or directions to anyone nearby or passing.

或者遭遇突发情况的时候，警员、救护队或消防员的制服上会出现安全警告的提示，为附近或过路人流指示安全方位。

youdao