lowadj.低的；少的；低落的；低声的；卑劣的；低等的adv.低地；低声地；低下地；廉价地n.低水平；低价；低谷v.哞哞叫low-rentadj.低租金的; 质量低劣的

1. The experiments of percussive penetration into rock plates at low velocities were made.
   摘要对花岗岩板进行了低速冲击凿入实验。