1·Does light travel in all directions?
光是向每个方向传播的吗？
2·This bag foreran the duffel bag for light travel to keep necessities in.
放在行李包前的包是用来放必需品的。
3·How fast does light travel?
光传得多快？
4·Could wormholes hold the secret to faster-than-light travel?
虫洞是否包含了超光速旅途的奥秘？
5·Does light travel out in one direction or in all directions?
光是沿着一个方向还是所有方向往外传播的？
6·So fast does light travel that we can hardly imagine its speed.
光速很快，我们几乎没法想像它的速度。 。
7·So fast does light travel that we can hardly imagine its speed.
光速很快，我们几乎没法像它的速度。
8·So So fast does light travel that we can hardly imagine its speed.
光速很快，我们几乎没法想像它的速度。
9·"Instead of having light travel in air, it travels within the lens," he says.
Bathiche解释说：“光线在这种镜片的内部传播，而不像普通镜片那样在空气中传播（和光纤非常类似）。
10·The speed of light shifts when the light travel through different cells.
光穿过不同的细胞时光速也会变化。