primary gun的用法和樣例：
例句
- The speeder is armed with antipersonnel blasters and a main anti-vehicle gun.
這種飛行艇配備反單兵爆能槍和一門(mén)反裝甲主炮。 - At Tyrwhitt's instigation a number of his cruisers were fitted with a ramp over the forward 6-inch gun.
在蒂里特的鼓動(dòng)下，他的巡洋艦有好幾艘在船首一五二毫米主炮上面安裝了滑道。
