求翻译：Sirens began wailing at 9:18 a.m. and lasted for three minutes in Shenyang, capital city of Liaoning Province, while more than 1,000 people from the central and local governments, the People's Liberation Army (PLA) and all walks of life gathered as part of the routine例行 activities.是什么意思？

Sirens began wailing at 9:18 am and lasted for three minutes in Shenyang, capital city of Liaoning Province, while more than 1,000 people from the central and local governments, the People's Liberation Army (PLA) and all walks of life gathered as part of the routine routine activities.

wailing Sirens began at 9:18 A. M. and lasted for three minutes in, capital city of Liaoning Shenyang Province, while more than 1,000 people from the central and local governments, and the ' s People Liberation Army (PLA) and all walks of life gathered as part of the routine routine activities.

Sirens began wailing at 9:18 a.m. and lasted for three minutes in Shenyang, capital city of Liaoning Province, while more than 1,000 people from the central and local governments, the People's Liberation Army (PLA) and all walks of life gathered as part of the routine routine activities.

Sirens began wailing at 9:18 a.m. and lasted for three minutes in Shenyang, capital city of Liaoning Province, while more than 1,000 people from the central and local governments, the People's Liberation Army (a PLA) and all walks life gathered as part routine of the routine activities.

Sirens began wailing at 9:18 a.m. and lasted for three minutes in Shenyang, capital city of Liaoning Province, while more than 1,000 people from the central and local governments, the People's Liberation Army (PLA) and all walks of life gathered as part of the routine of routine activities.