您要查找的是不是：
- When a fluid flows in a pipe, it moves fastest at the center of the pipe and slowest at the wall because of friction between the pipe and the flowing fluid? 当流体在管内流动时，靠近管子中心的流体流动速度最快，而靠近管壁的流体流动速度最慢，因为在流动的液体和管壁间有摩擦力。
- In the absence of friction belted machinery would not be used. 没有摩擦力，皮带传动的机器就无法使用。
- He moved the table over to the center of the room. 他把桌子移到房间中心。
- There is a great deal of friction between the management and the work force. 劳资双方之间存在大量矛盾。
- The center of the sun is exceedingly hot. 太阳的中心极其热。
- Our city is the industry center of the country. 我们城市是全国的工业中心。
- The company owns a famous department store in the center of London. 这家公司在伦敦市中心拥有一家很有名气的百货商店。
- A center of interest or activity. 中心兴趣或活动的中心
- One other law of friction should be noted. 摩擦力的另一个定律也应被注意。
- The compact faction fractured because of friction. 紧密小宗派由于摩擦破裂了。
- Soon there were other causes of friction. 但很快出现了其它情况，导致了摩擦。
- What is the force of friction acting on the crate. 板箱上受到的摩擦力是多少？
- Buses go to and fro between the center of the city and the city limits. 公共汽车往返行驶于市中心和城市边缘之间。
- The compact faction fractured because of friction . 紧密小宗派由于摩擦破裂了.
- Beijing is the political and financial center of China. 北京是中国的政治和金融中心。
- Scientists now believe that some of the force of friction is due to attraction between the molecules of one surface and those of the surface sliding over it. 现在科学家们认为有些摩擦力是由于物体表面的分子和另一物体表面游动的分子之间的吸引力所引起的。
- The force of friction affects the speed at which spacecraft can re-enter the earth's atmosphere. 摩擦力能影响航天器返回地球大气层的速度。
- A table stood in the center of the room. 一个餐桌摆在房间的中央。
- The dart landed plunk in the center of the target. 标枪正中靶心
- At the center of the square stands a monument. 在广场中心矗立着一座纪念碑。
