| 1. | Question 1 : can the track spacing be adjusted
线路间距可以调整吗？ |
| 2. | As well as telescopes , radar is also being used to track space junk
和望远镜一样，雷达也被用在追踪太空中的废弃物。 |
| 3. | Fixed railway installations . signalling . fixed indicator bracket for reduced track spacing
铁路固定装置.信号装置.减少轨道间隔用固定指示器支架 |
| 4. | Answer 9 : structural columns can be built between main lien and arrival and departure line , but not between main lines . the column shall meet the requirement of track spacing
答：铁路正线与与正线之间不可以设结构柱。铁路正线与到发线之间可以设结构柱，但要满足线间距的要求。 |
| 5. | The greater amount of information stored on a dvd is chiefly due to the smaller pit size and tighter track spacing , but another factor comes into play , namely compression
一张dvd能储存较大数量的信息，主要是因为光盘较小的凹坑和紧密的轨迹相间隔，但是另外一个因素也发挥了作用，即压缩。 |
| 6. | In this paper the effect of the track twist irregularity on the train derailment safety is analysed on the basis of dynamic analysis of train - tangent - track space - coupling time - varying system , and the limitation of the track twist irregularity in the line maintenance principle is assessed
应用列车-轨道空间耦合时变系统振动分析理论，分析了轨道三角坑对列车脱轨安全性的影响，并就现行铁路线路维修规则中对轨道三角坑的限值进行了评估。 |
| 7. | Abstract : in this paper the effect of the track twist irregularity on the train derailment safety is analysed on the basis of dynamic analysis of train - tangent - track space - coupling time - varying system , and the limitation of the track twist irregularity in the line maintenance principle is assessed
文摘:应用列车-轨道空间耦合时变系统振动分析理论，分析了轨道三角坑对列车脱轨安全性的影响，并就现行铁路线路维修规则中对轨道三角坑的限值进行了评估。 |
| 8. | But when come to track space object trajectory , this method is hard to realize good trajectory tracking performance , especially in great variety space object trajectory and severe outside disturbance control system , it is more difficult to improve the capability of trajectory tracking
但是，对于系统的空间目标轨迹，用这种平面轨迹跟踪的方法很难实现其良好的轨迹跟踪运动性能，特别是对于空间目标轨迹变化大、外界干扰严重的控制系统更是难以进一步提高其跟踪性能。 |
