您要查找的是不是：
- They are building a submarine cable tunnel. 他们正在建设一条海底电缆隧道。
- They are digging through the hill to make a tunnel. 他们正在凿山建一条隧道。
- A red light is usually a signal of danger. 红灯通常是危险的信号。
- The kid dug a tunnel in the sand. 小孩在沙堆里挖了一个地道。
- The two lanes merge going into the tunnel. 两条车道会合后引入隧道。
- I stood watching for the signal to change to green. 我站着等待交通信号转为绿灯。
- The truck cleared the tunnel safely. 卡车安全地通过了隧道。
- Let's set the clock by the radio time signal. 咱们照着收音机的报时信号把钟对一对。
- He has to stoop to get through the tunnel. 他得弯下腰走过地道。
- A red lamp is often a danger signal. 红灯常常是危险的信号。
- The roar of the train reverberated in the tunnel. 火车的轰隆声在隧道里回荡。
- A reflected signal on a communication channel. 一种在通信信道上反射回来的信号。
- The rise in prices was a signal for rebellion. 物价上涨引起了叛乱。
- The prisoner escaped by digging an underground tunnel. 囚犯挖了一条地道逃跑了。
- A channel over which pilot signal is transmitted. 可在其上传输导频信号的一种信道。
- The roof of the tunnel caved in (on the workmen). 隧道顶坍塌(压住工人).
- The signal was picked up by a downrange radar station. 该信号被试验飞行方向之内的雷达站收到了。
- The driver is winking his lights to signal a turn. 驾驶员打着一闪一闪的灯光信号表示要转弯。
- The roof of the tunnel was supported by wooden props. 坑道顶用木柱支撑。
- Everyone uncovered when the signal sounded. 信号响时，人人脱帽致敬。
