有关昨天街上发生的交通事故,警察调查了目击者。
Police called the eyewitness about the traffic accident which happened in the street yesterday.
警察调查这次交通事故。
警方正在对这起交通事故进行调查。
The police are making (carrying out) investigation into this accident.
警方正在对这起交通事故进行调查。
The police are making (carrying out) investigation into this accident.
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