Letter "PONTIAC", taken from the United States, Michigan, a place: Graphic logo is an arrow with a cross mark.
字母“PONTIAC”,取自美国密执安州的一个地名:图形车标是带十字标记的箭头。
Note that in light with orbital angular momentum, the direction of polarization (denoted by the direction of the arrow) does not change across the cross section.
值得注意的是,具有轨道角动量的光,偏振方向(用箭头方向表示)在截面内部发生变化。
Pedestrians must not cross on a left-turn green arrow unless a pedestrian signal tells them to.
绿箭头灯亮起时,行人禁止横穿公路,直至指示行人可通行的人行横道灯亮起。
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