敌人轰炸机失效了，因为是近距离战斗。
The enemy bombers were ineffective because they were fighting at close quarters.
大口径机炮将分为两种不同的种类，分别特化了远距离和近距离战斗。ꘀ。
High caliber cannons will come in two very different kinds, suited for long and close range fighting respectively.
德国人的经验表明，一般的冲锋枪太过笨重，一千英尺内无法保证精准度，不利于近距离战斗。
Experience showed the Germans that the average submachine gun was too muscular for reliable accuracy within a thousand feet, which made it sketchy in close combat situations.
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