conditional access
柯林斯詞典
1. N the encryption of television programme transmissions so that only authorized subscribers with suitable decoding apparatus may have access to them 有條件接收; 電視節(jié)目傳播信號(hào)被加密，只有配有合適解碼裝置的授權(quán)用戶才可以接收到該信號(hào)
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