no signal无信号;【检查你的电脑显卡接口,连接显卡与显示器连接处】No signal has yet been strong enough or run long enough to be unambiguously identified as originating from anextraterrestrial intelligence.还从没有过一个强度足够大或者持续时间足够长的信号能够毫不含糊地被确定为来源于外星智慧的。