您要查找的是不是：
- Impact compactor, for whose active wheel's structure is special, it requires highly for the traction force when working, and it is difficult to suit for the machine in working on today. 摘要冲击式压实机由于其冲击轮结构的特殊性，使得工作时对牵引要求很高，难以与现在的施工机械配套。
- This paper presents a fuzzy sliding-mode-based driving control of lunar rover with six active wheels running in the real world on the condition that small wheel slips and mismatch angle are taken into account. 研究了运行于自然环境、具有小滑移率及小失配角、六轮独立驱动的摇臂式月球车驱动控制问题。
- The office has been humming with activity. 办公室一直忙着搞活动。
- The threat of war has depressed business activity. 战争的威胁使经济萧条。
- There has been a lot of activity in the town today. 今天市中心相当热闹。
- The product is small an light.With four active wheels it is be moved conveniently. It can be used either in the store houses or in the workshop. 本产品体积小,重量轻,并配有四只万向轮移动特别方便,既可放在库房,也可放在车间里使用。
- The town was humming with activity. 该市镇生气勃勃，呈现一片热闹的景象。
- Stamp collecting is my favorite activity. 集邮是我最喜爱的消遣。
- The store was a scene of great activity. 这家商店顾客盈门。
- He once engaged in anti-government activity. 他一度从事反政府的活动。
- The office is humming with activity. 办公室里一片忙碌。
- A center of interest or activity. 中心兴趣或活动的中心
- Showing no optical activity in polarized light. 无旋光的极化光下无光学反应的
- An increase, as in movement or business activity. 进步，改进，改善运动或商业活动的进步或兴隆
- Indulgence in or pursuit of sexual activity. 纵欲; 追求肉欲对性行为的放纵或追求
- The phenomena associated with volcanic activity. 火山现象与火山活动有关的现象
- A range of endeavor or activity; a province. 范围努力做 ... 的范围或活动范围; 范围
- Strict regulations that paralyze economic activity. 阻碍经济活动的严格的规章制度
- A state of nervous activity; a fuss. 吵闹处于紧张活动状态; 吵闹
- Purposeful or industrious activity; enterprise. 企图，进取心有目的的、勤勉刻苦的行动; 进取心
