After a thorough investigation, many experts now believe that the streak was a run-of-the-mill jet aircraft contrail.
经过彻底的调查，许多专家现在认为，这条轨迹是一条普通的喷气式飞机尾迹。
A contrail is the visible vapor trail behind airplanes or rockets traveling at high altitudes.
这团痕迹可能是飞机或火箭飞上高空后留下的航迹云。
The width of the reservoir illustrated here is approximately 8 kilometers (5 miles); a jet flying over the reservoir left a contrail midway between the shorelines.
图片中显示出的水库宽度大约为8千米（5英里），一架从上方飞过的飞机在水库两岸之间留下了一条航迹云。
The simple and smooth curves like the contrail of the history river.
简洁流畅的线条，如历史长河的轨迹，源远流长。
I can see the contrail of a jet over Lamma Island and somewhere out there, the last stars flickering towards the other side of the world.
我能清楚地看见一架飞机从南丫岛上空飞过的痕迹，而就在那附近，还依稀可见即将消逝的星星，他们还将继续朝地球的另一端闪烁。
Exactness of machining program can be checked with the function of preview machining contrail.
开发了加工轨迹预览功能，能检验零件加工程序的正确性。
And the interpolation arithmetic, curve contrail programming and servo control are done by computer.
而相应的插补运算、曲线轨迹规划、伺服控制算法等都由计算机来完成。
In this paper, chip space movement contrail is studied systematically, and its initial movement contrail model is acquired.
本文系统研究了切屑的空间运动轨迹，获得了切屑初始运动轨迹模型。
A new diagonal fuzzy variable structure contrail tracker is designed to combine the virtues of fuzzy control with that of sliding-mode variable structure control.
文章试图结合模糊控制和滑模变结构控制的优点，设计一种新的对角型模糊变结构轨迹跟踪控制器。
Update at 8:05 a.m. ET, Nov. 11: Contrail Science now says the next time the flight's scheduled to fly over the coast is Friday evening.
11月11日美国东部时间早上8点05分更新：Contrail Science 发布的最新消息说， 按照该航班的航次安排，下次飞越这个海岸上空的时间是星期五晚上。
Update at 8:05 a.m. ET, Nov. 11: Contrail Science now says the next time the flight's scheduled to fly over the coast is Friday evening.
11月11日美国东部时间早上8点05分更新：Contrail Science 发布的最新消息说， 按照该航班的航次安排，下次飞越这个海岸上空的时间是星期五晚上。
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