“发信号”造句

几乎任何可以发出声音的东西都被用来发信号.
Almost anything that makes a noise has been used for signaling.

水手们白日用旗,夜晚用灯,发信号.
Sailors signal with flags by day and with lights at night.

范阿莱姆, 在默兹河对岸, 还在用他的灯发信号.
Van Alem , from across the Meuse, kept signalling with his lamp.

• #发信号