I sent a email to you onDec. 20th. 2012, Along with the attachment of various of samples' pictures for your selection, however, until now, I haven't received your reply, now I am sending you again for your choice.译文如上，供你参考...
Email sent on Dec 20th with pictures of many samples attached for your option, but no response received. Pls kindly check it and make your choice now. 本人长期从事外贸，邮件可以直接发送，没有问题的啦～...
