求翻译：今年7月5日上午，北京地铁四号线动物园站A口自动扶梯突发逆行事故，截至7月6日下午4点，北京地铁事故已造成一名男孩死亡、3人重伤，27人轻伤。是什么意思？

On the morning of July 5, Beijing Metro Line Zoo Station Port A sudden retrograde escalator accident, as at 16 o'clock on July 6, Beijing subway accident has caused the death of a boy, three people injured, 27 people were slightly injured .

On the morning of 5 July this year, the Beijing Metro Line 4 zoo station A mouth escalator accidents, sudden troubling as of July 6, at 4:00 p.m. on Beijing subway accident has caused a boys died, 3 people were seriously injured and 27 persons slightly injured.

This July 5 the morning, the Beijing subway four line zoos stand A escalator to arise suddenly go against the flow the accident, up to July 6 4 o'clock, the Beijing subway accident has created a boy to die in the afternoon, 3 human of severe wounds, 27 human of minor wounds.

This year the morning of July 5, Beijing Subway Line 4 line Zoo station escalator in a sudden reverse accidents, as of July 6, Beijing Subway accident which left a boy dead, 3 seriously injured, 27 persons slightly injured.

This year the morning of July 5, Beijing Subway Line 4 line Zoo station escalator in a sudden reverse accidents, as of July 6, Beijing Subway accident which left a boy dead, 3 seriously injured, 27 persons slightly injured.