信号

• Maybe he can't screen out bottom return .
  说不定他无法鉴别水底的反射信号。
• A train must not pass a signal that means danger .
  火车切不可越过危险信号。
• Keep in visual signalling touch .
  保持在看得见信号的距离中。
• The signals are transmitted to the observation center .
  信号被送往观测中心。
• Some warning signs have appeared .
  已出现了某些危险的信号。
• The magnetic signals are sensed by induction coils .
  磁信号由感应线圈所检测。
• The white flag is a token of surrender .
  白旗是投降的信号。
• Lucy's distress call was heard by the corvette .
  驱潜快艇听到了露西的呼救信号。
• The reflected signals come from the small inclusions .
  反射信号来自于少量杂质。
• It's a signal to them that'll sink in .
  这对他们是个信号，这个信号是会起作用的。