求翻译：三角形的图标意为在这个路段应该缓慢行驶。图标B意为不能向左转。图C是告诉我们乘公车的时间是在7：30到18：00之间。图标D是说这里不能照相。图E是告诉我们请勿喧哗。图F为禁止抽烟是什么意思？

Triangle icon means this section should be slow. Icon b do not turn left. Figure c is telling us to take a bus to 7:30 between the hours of. Icon d is saying here is not the photo. Figure e was told we do not make noise. Figure f is prohibited to smoke