“破片”的英语？

玻璃杯落在地上碎成破片.The glass fell to the floor and broke into fragments.研究了超高速破片碰撞 双层 靶形成碎片云的分布特点.Distributive characters of hypervelocity fragments impacting double - level target were researched.门因风而破片关上.The door slammed in t...