State a reference reason for your letter i. e. 'With reference to our telephone conversation...'
列出写信的相关理由(比如：关于我们电话里讨论的……)。
With reference to our telephone conversation today…
㥜关于我们今天在电话中的谈话…
Note: product prices for reference only, telephone or E-mail details please contact consultation!
注：产品价格只做参考，详细情况请电话或邮箱联系咨询！
With reference to our telephone conversation yesterday…
有关我们昨天在电话里所谈到的内容…
With reference to our telephone conversation yesterday…
有关我们昨天在电话里所谈到的内容…
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