head in the sand Эффект страуса Ostrich Effect Ostrich effect Ostrich effect 鸵鸟效应 Эффект страуса Ostrich effect Ostrich effect ostrich effect Wirkung des Straußes zu bestätigen head in the sand Ostrich effect stick their heads in the sand Ostrich effect described the ostrich effect Ostrich effect effect of the ostrich ostrich effect http://en.wikipedia.org/wiki/Ostrich_effect described Ostrich effect Ostrich effect ostrich ostrich effect Ostrich effect Ostrich effect ostrich effect ostriches do not bury their heads in the sand Ostrich effect Ostrich effect Ostrich Effect Ostrich effect stick their heads in the sand ostrich effect Ostrich effect 鸵鸟效应 http://en.wikipedia.org/wiki/Ostrich_effect ostrich effect Ostrich effect ostrich effect Ostrich effect stick their heads in the sand ostrich effect en Ostrich effect Ostrich effect Ostrich effect Ostrich effect Ostrich effect Ostrich effect Ostrich Effect Ostrich effect Эффект страуса