请帮我解释两个英语短语~~~
1，commercialbreak2，profitmargin请帮我用英语解释并翻译成中文~~~谢谢...
1， commercial break
2， profit margin
请帮我用英语解释并翻译成中文~~~谢谢 展开
2， profit margin
请帮我用英语解释并翻译成中文~~~谢谢 展开
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commercial break（广播、电视中插播的）商业广告
A commercial break usually consists of at least two advertising spots; in exceptional cases, however, individual spots are also permissible. There are two kinds of commercial breaks:
Flanking commercial break, placed before or after a program;
Interruptive commercial break, placed within a program.
profit margin [经]利润率；边际利润率
the ratio gross profits divided by net sales
A commercial break usually consists of at least two advertising spots; in exceptional cases, however, individual spots are also permissible. There are two kinds of commercial breaks:
Flanking commercial break, placed before or after a program;
Interruptive commercial break, placed within a program.
profit margin [经]利润率；边际利润率
the ratio gross profits divided by net sales
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