This paper uses Senell sLaw and applys the way of Computer Modeling to draw the light track in the media which have layer gradients of the index of refraction.

本文利用斯涅耳定理，采用计算机模拟的方式给出光在折射率呈层状梯度分布的介质中的传播路径。

youdao

It is significant to accelerate the construction of urban light track transit system in such circumstance as urban public transit is becoming more and more tight.

论述了目前我国城市交通日趋紧张的情况下，加快城市轻轨交通系统建设的重要意义。

youdao

The light it gives off can then be used to track the protein in living cells.

它发出来的光可以用来跟踪生物细胞中的这种蛋白质。

youdao

Also included is the title track from Queen Latifah's album of jazz standards "Travelin' Light."

VOA: standard.2010.04.12

"For athletics,track and field and for swimming, there's kind of like a traffic light.

VOA: standard.2009.09.10

The trail begins with two hours of a light track until you reach the Carrasqueira, a steep wall of stone crossed with the use of ropes and helmets.

BBC: Trekking in Rio de Janeiro

Sunday's race will be the first time an F1 race has started in daylight and ended under floodlights and the drivers were quick to get out onto the track to assess the impact of the changing light conditions and the cooler track temperatures.

BBC: Kovalainen top as McLaren shine

Armed with their iPhones, they were able to use the GPS and mapping features to get to the exact positions they needed to track the light.

FORBES: Students Use iPhones to Debunk Ghost Story