您要查找的是不是：
- Plasma in space are collision free. 空间中等离子体是无碰撞的。
- TDMA-based MAC protocol is inherently collision free but it has poor scalability. 基于TDMA的MAC协议具有固有的节能特性;但是其可扩展性较差.
- Material Characteristics: Optical quality glass, quartz glass, lead and cadmium free multi component silicate glass, or borosilicate glass or Plastics. 材料特性:光学质量级别的玻璃,石英玻璃,含有铅和镉的多元素硅酸盐玻璃或者硼硅酸盐玻璃。
- With limited support of human, SUPER-PLUS scans the cluttered environment with a wrist-mounted laser distance sensor and plans the manipulator a collision free path to fetch the bomb. 排爆机器人SUPER-PLUS在有限人参与下，利用手腕装载的激光测距传感器，扫描爆炸物周围的障碍环境，规划出一条无碰轨迹，实现爆炸物自主抓取。
- Code Division Multi Access (CDMA) 码分多址
- A METHOD OF COLLISION FREE PLANNING FOR MULTI-ROBOT 一种多移动机器人避碰规划方法
- multi access system control terminal 多路存取系统控制终端
- time division duplex-code division multi access 时分双工-码分多址
- multi access on-line programming 多路存取联机程序设计
- Collision free packet reservation multiple access(CF-PRMA)protocol and its performance 无冲突分组预约多址接入（CF－PRMA）协议及其性能
- He pushed hard on the brake pedal to avoid a collision. 他使劲踩下煞车踏板以避免撞车。
- Reading occupies most of my free time. 阅读占去了我大部分的闲暇时间。
- Citizens may have free access to the library. 市民可以免费使用这个图书馆。
- He was badly concussed in the collision. 在猛烈碰撞时他的脑部受到严重损伤。
- All students have free access to the library. 所有学生都可自由进入图书馆。
- The crew remained free from scurvy. 那些船员仍然没有患坏血病之虞。
- The collision between the ships was caused by fog. 船只相撞事件因雾造成。
- The nearside wing was damaged in the collision. 汽车碰撞时左侧的翼子板撞坏了。
- The two parties are on a collision course. 这两个政党正朝著导致冲突的方向发展。
- He's a fervent believer in free speech. 他是言论自由的强烈信仰者。
