I can ask myself now the question, how far does electromagnetic radiation, how far does light travel in the time of one period capital t?

现在我们能问，电磁辐射，有多远，光在一个周期T内，行进了多远？

youdao

As much as he wanted to be by her bedside during the operation, her father couldn't get a visa to travel to Spain in time, another problem for Colombians who are routinely eyed with suspicion by immigration officers across the world.

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The clock typically doesn't start or stop on travel time between the station and a fire until someone in the truck pushes a button.

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The trip is expected to take 12 to 15 days and has suffered multiple false starts as the Thompsons try to line up the logistics of visas, border crossings and travel time timetables in a part of the world where buses and ferries don't tend to conform to strict schedules.

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