When the shooting had occurred, the school was put on lockdown and a large police force was dispatched to the school until the threat was removed.
 school is put on lockdown school is locked down
學校封鎖 = school is put on lockdown = school is locked down也就是說，某一個地方封鎖，都能用 be put on lockdown 或 be locked down 來表示。
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使喚的英文怎麼說? (二選一)下一題 - 亭子 f我要發問
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