美 [ˈsɪɡnəl flæɡ]
n. 信号旗；手旗
a rectangular piece of fabric used as a signalling device
同义词： flag
信号旗
号志旗
号旗
信号旗
信号旗（signal flag） 帆船比赛时,裁判员组织和指挥比赛的用具。帆船比赛 的水域较大，要组织好以风力为动力的帆船进行比赛，只有通过裁判船用国际旗语...
Of course it is, as it is the signal flag of misery.
当然是的，因为那是痛苦的信号旗。
The signal flag is fully in our sight from this position.
我从这个位置完全可以看到信号旗。
A fox USES its tail (or "brush") as a warm cover in cold weather and as a signal flag to communicate with other foxes.
狐狸用它的尾巴(或“毛刷”)在冷天时盖上保暖，同其他狐狸交流时亦可用来做信号旗。
Generally, a bearish momentum divergence is a red flag warning signal, which often presages a pullback or correction.
"After the dissuasion by means of whistle-blowing, shouting and hand-flag guiding was of no avail, the Chinese naval vessels fired two red signal shells into the sky as a warning, and the signal shells burned out and extinguished in the air, " Xinhua quoted the official as saying.
BBC: China 'fired flares' at Vietnam boat in South China Sea
Their idealised version of this question was to ask how two signal chemicals, starting from opposite ends of an embryo, could result in a pattern that looked like the French flag (ie, three different coloured vertical stripes).