Also, cable advertisers generally do not have to make the large up-front commitments, which may be as much as a year in advance, the networks require.
请问老师，which的先行词commitments may be as much as a year in advance. 承诺是一年，这应该如何理解？
which的先行词为 large up-front commitments 。至于这个术语如何翻译为汉语，就需要广告专业知识了。作为非专业人员，你作一般性了解即可。
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