求翻译：我们承认在4月份从你的邮件里得知有密度质量问题，并及时的承诺补偿500美金。但是,5,6,7月份我们再没有收到过任何有关类似的质量问题从你那里，我们认为这个问题从那以后再也没有了，因为我们也加强了这方面的管理与检查。直到8月23日收到你的邮件后，我们对后来出现这么大数量的质量问题产品感到十分的惊讶。是什么意思？

We recognize that in April from your mail that the density quality problems and timely commitment to compensation of $ 500. However, the 5,6,7 month we again did not receive any information about a similar quality problems from you, we believe that this issue since no because we also strengthen the

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We acknowledged knowing has the density quality question in April from yours mail, and the prompt pledge compensates 500 dollars.But, 5,6,7 month of we have not received any related similar quality question again from your there, we thought this question also did not have again from that later, beca

We acknowledge in April from your mail learned that density of quality problems, and promise compensation of $ 500 in a timely manner. However, 5, 6, in July we did not receive any from you on similar quality issues, we believe that the issue has since then never, because we are also strengthening t

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