However, there were much more activities in ancient times than what we have today, from which we can trace the course of a gradual evolution.
而在历史上，清明节的内容则比今天多得多，这里也有一个逐渐衍变的过程。
The archive features multimedia Tours, interactive time lines that trace the evolution of mapping, and over 500 irreplaceable maps that trace the course of history.
这份档案文件的特点是拥有多媒体游览，并且利用互动式的时间轴来演示制图的演化，而且收录了超过500张在历史考察中具有不可取代地位的地图。
The characters are of course fictional, so those with a fondness for history need not trouble themselves trying to trace them out.
这些人物当然是虚构的，所以那些喜欢历史的人不必费心去寻找他们。
It's the first study to trace the fluctuation of a natural (not human-caused) aerosol around the globe over the course of a century.
这是第一个试图勘测整个世纪地球表面自然(非人造)环境中悬浮颗粒的研究。
Of course, to make the execution trace useful, I'll need to expand on the minimal information output by the Listing 1 methods.
当然，要使执行踪迹有用，需要对清单1的方法给出的最小信息输出进行扩展。
And close to the mast step the starboard deck plank has small oval surface. It is the trace of a pomp, of course!
并靠近桅杆一步右舷甲板木板小椭圆形的表面。这是一个泵的踪迹，当然！
But he would pick it up again, or have just a trace of it, and he swam fast and hard on the course.
但是它总会重新嗅到，或者就嗅到那么一点儿，它就飞快地使劲跟上。
XRD and FT-IR spectroscopy were used to trace crystallization course in the formation of titanium silicalite molecular sieve, and its crystallization mechanism was discussed.
通过XRD和FT - IR等分析手段跟踪钛硅分子筛晶化生成分子筛的过程，并探讨了钛硅分子筛晶化生成分子筛的晶化机理。
The paper introduces deburr algorithm before line trace in the course of vector quantization of binary map image, and it can receive better effect through applying for the algorithm.
介绍对二值地图图像矢量化过程中的线跟踪操作之前的去毛刺算法，应用此算法可以得到更好的线跟踪效果。
In the course of drawing process, the process interference and defect take place because of the difference between the centerline of concave die and the trace of moving direction.
结晶器铜管在引仲加工过程中，由于凹模中心线与机床运动方向轨迹线不同，造成加工干涉和产品缺陷。
It is verified that ph ase separation of trace amount of water in the organic solvent is the most possible course of vacuole formation.
实验证明，气泡主要是由于有机溶剂中微量水的微相分离造成的。
Of course in the fast currents they are trying to swim in, others may sink without a trace!
当然，在他们试图游进的快速的浪潮之中，其他人可能已经沉没得无影无踪！
Tracing service: our clients can command the whole course of cargo's circulation at the first time, which help them trace and handle their cargoes.
货物状态信息跟踪服务：通过登陆扬子江快运网上货运信息系统，用户可以第一时间全程掌握货物流转的状态，实现货物跟踪，方便用户货物处理。
Tracing service: our clients can command the whole course of cargo's circulation at the first time, which help them trace and handle their cargoes.
货物状态信息跟踪服务：通过登陆扬子江快运网上货运信息系统，用户可以第一时间全程掌握货物流转的状态，实现货物跟踪，方便用户货物处理。
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