例句與造句

1. On 15 July 1943, an earlier model of the Sturmgewehr was demonstrated before the People's Commissariat of Arms of the USSR . The Soviets were impressed with the weapon and immediately set about developing an intermediate caliber automatic rifle of their own, to replace the PPSh-41 submachine guns and outdated Mosin Nagant bolt-action rifles that armed most of the Soviet Army.
2. It's difficult to find intermediate calibers in a sentence. 用intermediate calibers造句挺難的