发出: issue; send out; give out; d ...求救: cry for help; ask sb. to com ...的: 4次方是 The fourth power of 2 i ...信号: signal; semaphore; gun计算机发出的信号: computer-generated signal发出竞赛开始的信号: drop the flag求救信号: distress call; may day; mayday; s.o.s. save our ship; sos save our souls; weft发出的信件: outgoing letter向团部发出开始进攻的信号: signal to the regiment for the attack to begin织物, 狭长求救信号旗, 求救信号: weft紧急求救信号: sos求救信号（混音版）: s.o.s（hi-tack remix)-fitrerfunk求救信号脉冲: distress-call pulse; emergency pulse遇难求救信号: cqd信号的信号: signals signal求救信号；遇险信号: distress signal发出信号: operational out; outgoing signal; the signal is sound一发出信号: at the drop of a hat国际遇难求救信号: international distress signal求救信号；遇险呼号: distress call无线电求救信号: radio alarm signal; radio distress signal作为海难求救信号: c.q.d导的信号: homing signal恶化的信号: degraded signal发射的信号: heliogram
