当警察来时
When the police come
以上为机器翻译结果，长、整句建议使用 人工翻译 。
当警察冲过来时，人群便散开了。
The crowd scattered when the police charged.
youdao
当救护车开来时，警察叫我们让开。
The police told us to stand clear as the ambulance arrived.
路人赶紧叫救护车，当救护车来时交通警察也抵达来处理车祸了。
A passerby hurriedly called an ambulance. No sooner had the ambulance arrived then the police also arrived to deal with the accident.
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