maximum rate of fire

例句：

1. 1. The tank's maximum rate of fire is 50 rounds per minute.
   坦克的最大火力输出是每分钟50发。
2. 2. The aircraft's maximum rate of fire is 300 knots.
   该飞机的最大火力输出为300节。
3. 3. The gunner had to increase the maximum rate of fire to keep up with the enemy'sadvance.
   炮手不得不增加最大火力输出，以跟上敌人的前进。