信号

huǒ chē qiè bù kě yuè guò wēi xiǎn xìn hào

火车切不可越过危险信号。

A train must not pass a signal that is at danger.

xìn hào shì yòng qí huò dēng fā chū de

信号是用旗或灯发出的。

Signals are made with flags or lamps.

tā men yòng xìn hào gào zhī wǒ men tā men suǒ chǔ de wèi zhi

他们用信号告知我们他们所处的位置。

They signaled their position to us.

qǐng xuǎn zé xìn hào lèi xíng

请选择信号类型。

Please select the type of signal.

xiàng yǔ zhòu fēi chuán fā chū le wú xiàn diàn xìn hào

向宇宙飞船发出了无线电信号。

A radio signal was sent to the spacecraft.

diàn mǎ xìn hào tōng guò wèi xīng tiān xiàn jiē shōu

电码信号通过卫星天线接收。

The coded signal is received by satellite dishes.