问题描述：
英语翻译
对方邮件：It is observed that you are using 120x600 banner size as the Ecpm is low for this size now.So instead of this please use 160x600 banner size for better earnings.
Please send the acknowledgement after changing the banners.
我要回答他已经换好了,用英语该怎么说
顺便问下他：你建议我使用哪三种大小的banner，以获得最大收益
对方邮件：It is observed that you are using 120x600 banner size as the Ecpm is low for this size now.So instead of this please use 160x600 banner size for better earnings.
Please send the acknowledgement after changing the banners.
我要回答他已经换好了,用英语该怎么说
顺便问下他：你建议我使用哪三种大小的banner，以获得最大收益
问题解答：
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