Please obey the unified command of security guard when you meet the emergency. You should evacuate in order according to the evacuation plan. Avoid crowding and strictly prohibit trample.是什么意思_Please obey the unified command of security guard when you meet the emergency. You should evacuate in order according to the evacuation plan. Avoid crowding and strictly prohibit trample.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句