... secondary signal bridge 备用信号桥楼 secondary signal 副信号 secondary source of pollution 次污染源 ...
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一艘美国大军舰，密密麻麻布满了100多副巨型铜质天线，为舰上武器、雷达及语音数据通信收发信号。
BIG American warship bristles with more than 100 large copper antennae that send and receive signals for its weapons, its radar and its voice and data communications.
一艘美国大军舰，密密麻麻布满了100多副巨型铜质天线，为舰上武器、雷达及语音数据通信收发信号。
A BIG American warship bristles with more than 100 large copper antennae that send and receive signals for its weapons, its radar and its voice and data communications.
光线进入眼睛，在视网膜上形成了一副倒立的画面，视网膜将光线译成神经信号，脑子识别信号并将画面倒立回来，于是我们就知道我们看到的是什么画面了。
Light entering the eye forms an upside-down image on the retina. The retina transforms the light into nerve signals for the brain.
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