您要查找的是不是：
- I started when I heard a noise behind the door. 听到门后的声音我一下子跳了起来。
- noise behind the signal 调制噪声
- She looked round when she heard the noise behind her. 她听到身後有声响，就回过头去看。
- He turned around as he heard a noise behind him. 他听到身后有响声，便转过身来。
- I stood watching for the signal to change to green. 我站着等待交通信号转为绿灯。
- Soon I dropped behind the rest of the class. 不久我就落在班上其他同志后面了。
- We discovered a secret passage behind the wall. 我们在墙后发现了一个秘密通道。
- I hid the broken plate behind the table. 我把打碎的盘子藏在餐桌后面了。
- They are brewing a plot behind the scenes. 他们正在幕后策划一个阴谋。
- 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 moon peeped out from behind the clouds. 月亮从云层中隐现。
- Everyone uncovered when the signal sounded. 信号响时，人人脱帽致敬。
- He turned around when he heard a noise behind him. 他听到身后有响声就转过身来。
- The train must stop when the signal's red. 信号机是红色时,火车必须停驶。
- A fawn behind the tree looked at us curiously. 树后面一只小鹿好奇地看着我们。
- The President's arrival was the signal for an outburst of cheering. 总统来到爆发一阵欢呼声。
- The backfield player whose position is behind the line of scrimmage and who usually calls the signals for the plays. 四分卫后场运动员，位置在开球线后面，通常为比赛发号指令
- The moon emerged from behind the clouds. 月亮从云层後露出。
- He concealed himself behind the tree. 他藏在树后。
- The equipment picked up the signal from the satellite. 这设备收到了卫星发出的信号。
