mistake

• Two copies of the same book have been bought by mistake .
  书买重了。
• Mistakes were corrected and gaps filled .
  错误改正了，缺点也弥补了。
• He makes mistakes , and that very often .
  他犯了错误，而且是常常犯。
• It will prove his historic mistake .
  这肯定是他的一个历史性的错误。
• We shouldn't be indulgent towards his mistakes .
  不应该姑息他的错误。
• We tend to make mistakes when we do things in a hurry .
  忙中不免出错。
• I was conscious that i had made a mistake .
  我意识到自己犯了一个错误。
• There are so many mistakes that i cannot count them .
  错误多得数不清。
• We weren't going to make that mistake twice .
  我们不能再重蹈覆辙。
• He seems to have mistaken a plus for a minus .
  他似乎把正号误作负号了。