trajectory of gunfir

At this time, the roaring sound in his ears was closer, and the vibrations of the walls and floor were more obvious.,After finishing, the sergeant turned to Wang Zhong and said, "Sir, what do you think",Wang Zhong thought, "What can I possibly say I've only ever commanded troops in the game. I'm a complete outsider. Besides nodding, I don't seem to be able to do anything else."。