- Following the random shooting, the police locked down the freeway to search vehicle to vehicle for the sniper.
- The road has been closed down due to the ongoing investigation for the shooting of an innocent victim while filling his tank at the gas station.
 to lock down to close (down)
封鎖 (e.g. 公路、道路等) = to lock down = to close (down)close down 比 close 更有強調的感覺。
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