The Frequency Shift Keying modulation is widely used in HF digital communication.移频键控是短波数字通信中常用的一种调制方式.Her sister carried with her most of the grimness of shift and toil.她姐姐身上还带着艰辛操劳的痕迹.Before deselecting shift the selec...
Sentinels were placed at all the approaches to the farm.在去农场的所有路上都布置了哨兵.Sentinels stopped them, enquired, passed them.哨卡拦阻他们, 盘问他们, 放他们通行.Their pink buds , thrust up like arrows , seemed sentinels watching over Baiyangdi...