The researchers also considered whether their model allows timetravel.
研究人员还考虑了他们的模型是否允许时间旅行。
2
"Timetravel in this model looks like it's impossible," said Smolyaninov.
从这个模型看来，时间旅行是不可能实现的。
3
In the toy model, the equivalent of timetravel would be for a plasmons to complete a loop that runs along the exact same path it had previously traveled.