单词	test dark period
释义	test dark period 试验暗期
随便看	telegraph turnover jacks telegraph type data telegraph-type data transmission telegraph type interface telegraph-type interface telegraph type network telegraph-type network telegraph vehicle telegraph vibrating relay telegraph voice frequency channel Telegraph was invented by Samuel Morse in 1844 telegraph wave telegraph waveform telegraph wave form telegraph wheel telegraph wire telegraph-wire telegraph wires telegraph word telegraph wordconventional telegraph writing telegraphy communication telegraphy demodulator telegraphy exchange telegraphy in general