In the toy model, the equivalent of time travel would be for a plasmons to complete a loop that runs along the exact same path it had previously traveled.

在模拟模型中，代表时间旅行的将会是等离子体激元在它们之前走过的路径上完成一个环。

youdao

But how on Earth do we travel in time? How do we find a path through the fourth dimension?

时间旅行也就意味着在第四空间旅行。

youdao

The forecast of route travel time is the base of all the forecasts, and aimed at computing the used time on the given path.

路段行程时间的预测是所有预测的基础，路线行程时间的预测主要针对给定的路线进行时间耗费的计算。

youdao

And yet let's also make the path to citizenship long enough so those who travel it have time to process it all and difficult enough so that, if they eventually get citizenship, they'll treasure it.

CNN: Path to citizenship should be a long hike