1、a visual signal to control the flow of traffic at intersections.
十字路口控制交通的可見信號(hào)。

2、a visual signal to control the flow of traffic at intersections
十字路口控制交通的可見信號(hào)。

3、Another visual signal produced by while-tailed deer is termed a buck scrape.
另一種由尾鹿產(chǎn)生的視覺信號(hào)被稱為擦鹿信號(hào)。

4、If a whistle is not available, use the visual signal alone.
如果無口哨的話，只使用可視信號(hào)。

visual signal翻譯