求翻译论文的摘要，急用，谢谢大家！

Projectile Motion is a common form of movement is very important. Mechanical materials usually involve throwing movement in the discussion of air resistance are ignored, but in the air movement of objects should be the role of air resistance. Air resistance on the impact of projectile movement can not be ignored. This paper analyzes the regularity of air resistance and to study the air resistance on projectile motion. When focused on resistance and speed is directly proportional to the time when the left side followed by movement of the movement, through the theoretical equations derived its trajectory, the projectile where the shooting range with a high and a relatively ideal situation, so that people on the left body movement, more in-depth understanding.