信号白色
signal───adj.显著的；作为信号的；n.(Signal)人名；(瑞典)西格纳尔；vt.标志；用信号通知；表示；n.信号；暗号；导火线；vi.发信号
signal wire───[通信]信号线
radio signal───无线电讯号；无线电信号
home signal───进站信号（机）；[铁路]进站信号；[铁路]进站信号机
signal processing───[通信]信号处理
alarm signal───[安全]警报信号；n.警报，警报信号
digital signal───[自][通信]数字信号
signal words───信号词；标志词
signal twice───发出两次信号
of the U.S. Coast Guard. Bring plenty of water to drink, sun protection, a flashlight, vital medications, and white sheets or colorful towels to signal rescuers.───带上足够喝的水、防晒用品、手电、救命药、白色床单或者颜色鲜艳的毛巾作为求救信号。
The boat that now arrived, assured by the answering signal that all was well, soon came in sight, white and silent as a phantom, and cast anchor within a cable's length of shore.───那艘帆船还是等在外面，在观察回答的信号究竟对不对，不久，它就静悄悄地驶近了，只见白朦朦的一片，象是一个幽灵似的，在离岸一箭路以外抛了锚。
The plant detects the substance and activates an internal signal that causes it to lose its green colour, turning its leaves white.───当植物监测到那些有害物品时就会激发内信号，使叶子从绿色变成白色。
Experiment on acoustic pyrometry is done using the chirp signal, white noise and sine wave respectively in a 300MW boiler in one domestic power plant, through fire hole on furnace wall.