Rebel artilleryunits have regularly bombarded the airport.
叛军的炮兵部队经常炮轰机场。
《柯林斯英汉双解大词典》
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Hence knocking them out with an EMP weapon can enable you to buy enough time to attack your enemy's lines without taking damage from the artilleryunits raining rounds on you.
The vehicle's central cannon is modular, allowing different artilleryunits to be fitted with different weapon types, such as ion cannons, anti-vehicle laser cannons or concussion missile launchers.