I am sorry about the last few e-mails!! Hey friends, sorry about flooding your e-mail account. A technical mistake occured when I've send my last question. I am very sorry about that! Bye, Marcel

谁可以帮我一个忙？I need help! I've got a question: http://www.italki.com/knowledge/contribution-%E8%B0%81%E5%8F%AF%E4%BB%A5%E5%B8%AE%E6%88%91%E4%B8%80%E4%B8%AA%E5%BF%99%EF%BC%9F.htm