A beam of light that can pull is counterintuitive to physicists, who have spent centuries studying light's ability to push.
由于已经花了几个世纪研究光的推动能力，物理学家们的直觉意识到会有一种光束能够拉动物体。
But turning this push into a pull required more sophisticated optics -in Grier's case, a solenoid beam.
但是将这种推力转化为一种拉力需要更加复杂的光学，比如，在格里尔的设计中，是通过一种螺线管状光束。
The override action occurs when a slight pull toward the driver on the switch lever providers high beam headlights regardless of the amount of light on the sensor-amplifier.
轻轻朝着驾驶员的方向拉动开关控制杆这一动作，就可以使前照灯远光灯泡点亮，而不用顾及灯的数量。
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