V形或箭头路标表示有向左或向右的急转弯。The chevron or arrow road sign indicates a sharp bend to the left or right.地球的经度是用格林尼治子午线向东或向西的度数来表示的.Terrestrial longitude is measured in degrees east or west of the Greenwich meridian.在计算机图形学中, 只限于指...