Definition: an activity which is planned to achieve something Level: C1
地震后，一场大规模的救援行动启动了。
Following the earthquake, a large-scale rescue ___operation was launched.
空运补给的行动将尽快开始。
The ___operation to fly in supplies will begin as soon as possible.
政府授权在该地区进行军事行动。
The government authorized a military ___operation in the region.
